List of The 100 characters


The 100 is an American post-apocalyptic science fiction drama developed for The CW by Jason Rothenberg, and is loosely based on the novel series of the same name by Kass Morgan. The series follows a group of survivors who return to Earth, ninety-seven years after a nuclear apocalypse left the planet uninhabitable. Soon, they come across the various settlements of other survivors that survived the disaster, including the Grounders, the Reapers, and the Mountain Men.
The series stars Eliza Taylor as Clarke Griffin, as well as Paige Turco, Thomas McDonell, Eli Goree, Marie Avgeropoulos, Bob Morley, Christopher Larkin, Devon Bostick, Isaiah Washington, and Henry Ian Cusick. Lindsey Morgan and Ricky Whittle, who recurred in the first season, joined the main cast for the second season. Richard Harmon was promoted to the main cast in the third season, after recurring in the first and second seasons. Zach McGowan, who recurred in the third, was promoted to the main cast for the fourth season. Tasya Teles was promoted to the main cast in the series' fifth season, after appearing as a guest in the second and third seasons, and recurring in the fourth. Shannon Kook joined the main cast in the sixth season, after a guest appearance in the fifth. JR Bourne and Chuku Modu, who recurred in the sixth season, were promoted to the main cast in the seventh season, whilst Shelby Flannery had a guest appearance in the sixth season before joining the main cast in the seventh.
The following is a list of characters that have appeared on the television series. Although some are named for, or based upon, characters from Kass Morgan's The 100 novel series, there are others created solely for the television series.

Overview

;Notes

Characters

Sky People

Sky People is a term the Grounders use for the people who came from the international space station known as the Ark. The Sky People alive today are descendants of humans who survived the nuclear apocalypse 97 years before the series by living in space in the Ark. Within the Sky People community, there is a subgroup. Known as The 100, this group includes one hundred juvenile delinquents who, after it became clear that the Ark was dying, were sent to Earth in order to determine if the planet had become habitable enough for the rest of the Sky People to survive in exchange for being pardoned of their crimes. However, the name the 100 is a slight misnomer, since, along with the aforementioned hundred delinquents, there were also two additional young adults who came with them to Earth; one was a security guard who snuck aboard their ship to ensure the safety of his sister, and the other was a young engineer who came down to Earth in a pod shortly afterward to reassure the council that the delinquents survived their journey.
In the sixth season, due to everything that has happened, it is revealed that there are not many Sky People left when Abby seeks blood donations in an effort to save Marcus Kane.

Grounders

Grounders is any of the groups of people who were born on Earth rather than in space or in Mount Weather. The Grounders are descendants of humans who survived the nuclear apocalypse 97 years ago, due to their enhanced tolerance to nuclear radiation. Many of the Sky People have negative views toward Grounders, who they see as barbaric stone-age savages, just like a lot of Grounders have a negative view of The 100, who they see as hostile colonizers, though relations between the two groups are slowly improving over time. The Grounders speak an English-based pidgin language called Trigedasleng, although many of them also know regular English. Grounders were the primary antagonists of the first season. There are at least twelve Grounder clans in eastern North America, including the woods clan known as the Tree People, the dominant clan; Ice Nation, antagonists of the third season and the fourth; the Boat People ; and other tribes such as Glowing Forest, Rock Line, Broadleaf, Blue Cliff, Plains-riders, Shallow Valley, the Desert Clan, the Lake People, and the Delphi.
As revealed in "Anaconda," the Grounders were founded by Callie Cadogan and her followers who left the Second Dawn bunker after taking Nightblood and the Flame. Having enough Nightblood for 2,000 more people, they intended to seek out and help other survivors of the nuclear apocalypse. Trigedasleng was a language created by Callie when she was only ten years old. In addition, the word Trikru appears to have been inspired by an environmentalist group that Callie was a part of before the apocalypse called Tree Crew and pronounced the same.

Mountain Men

Mountain Men is the small colony of people who reside in Mount Weather. They are the primary antagonists of the second season. The Mountain Men are descendants of humans who survived the nuclear apocalypse 97 years before the start of the series by bunkering down inside Mount Weather, protecting them from the radiation caused by the bombing, but also preventing them from developing an immunity to the radiation as the Grounders did. This not only forced them to remain inside the facility unless they wore protective suits, they also had no choice but to capture Grounders and harvest their blood, which they used for transfusions to survive even the small amount of radiation exposure they received inside Mount Weather. The Mountain Men are responsible for creating the acid fog that has killed numerous outsiders, as well as the barbaric Reapers who helped them capture Grounders for their blood-harvesting program. Because so many Grounder and Arker lives were lost in the name of the Mountain Men's survival, both groups hold very negative views toward those residing in Mount Weather, although some people within the mountain actively reject treatment with the blood stolen from Grounders unless absolutely necessary, for moral reasons. In the second season, while holding forty-seven of the 100 prisoners, the Mountain Men discovered that a transfusion of bone marrow from the former Ark residents could grant them permanent immunity from the radiation, but the eventually fatal consequences for captured Arkers of the marrow-harvesting drive Clarke to a point where she is forced to open the air filtration system of the mountain, killing every one of the Mountain Men in order to save her own people. The Mountain Men are finally extinct when Clarke kills Carl Emerson, the last of the Mountain Men living in the third season.

''Eligius IV'' prisoners

The ship Eligius IV was carrying prisoners was deployed to asteroid Proxima VI before the nuclear apocalypse on Earth happened. The purpose of the expedition was to mine Hythylodium. In 2047, the prisoners started to become sick and the captain issued "Order 11", which would abandon the prisoners on the asteroid. Out of altruistic reasons, one of the ship's pilots Miles Shaw deactivated the shock collars of prisoners that lead to the massacre of the ship's crew and an explosion that destroyed one of the engines. Led by Charmaine Diyoza, the prisoners decide to return to the post-apocalyptic Earth but with an engine destroyed, it would take decades to reach there. The prisoners put themselves through cryosleep to evade aging. In 2156, Shaw piloted the transport craft Gagarin and lands Diyoza with a party of prisoners in the Shallow Valley, which is apparently the only habitable place left after the radiation wave Praimfaya in the fourth-season finale. They act as antagonists in the fifth season and are eventually defeated, but the lives of those who surrendered are spared. The prisoners' second leader McCreary launches the Damocles bomb against Shallow Valley in an act of scorched earth, destroying the valley and rendering the Earth uninhabitable. Even decades later the Earth fails to recover and as a result, is deemed permanently uninhabitable. In season 7's "From the Ashes," its stated that there are 36 prisoners left alive. The prisoners have been released to help build a new compound on Sanctum for everyone to live in. In "False Gods," Hatch, who had been imprisoned for bank robbery and murder, as well as three others die stopping a nuclear reactor meltdown, leaving 32 prisoners alive. In "The Flock," another prisoner is killed by a member of Wonkru following a hostage situation, reducing their population to 31.

''Wonkru''

Wonkru is a new, united clan, consisting of the former eleven remaining Grounder clans and Skaikru, founded by Octavia Blake. Later, they are now led by the new Commander, named Madi. After the Flame is destroyed, many of Wonkru abandon the leadership of Clarke and her friends though some remain on their side. With the situation getting progressively worse, Indra attempts to get Madi to retake command without success. Instead, John Murphy and Emori convince Indra, who they realize was the true power behind Wonkru in the bunker, to take leadership of the clan herself. Indra is able to reunite Wonkru under her command with only one warrior, Knight, trying without success to challenge her.

Sanctumites

With Earth running out of resources, a colonization mission was sent out on Eligius III to five potentially habitable worlds. Alpha, later renamed Sanctum by Josephine Lightbourne, was a habitable moon settled by Mission Team Alpha who later became the ruling families, known as the Primes, with their leader, Russell Lightbourne. Although some of the Sanctum Citizens are potentially descendants of the Primes themselves, they had landed on Sanctum with a thousand frozen embryos to start the colony which is the most likely origin of most of the people, though the remaining embryos were eventually destroyed by Gabriel Santiago. Taught to revere the Primes as living divinity due to their ability to resurrect themselves through Nightblood hosts, the citizens eventually rebel at the end of the sixth season after learning the truth, leading to the death of most of the Primes. In the seventh season, the Sanctum Citizens struggle to adapt to their new reality while tensions rise between the various factions on the moon. Many are subsequently slaughtered by Sheidheda.

Children of Gabriel

The Children of Gabriel is a rebel militia group, who are in conflict with the Primes, the twelve quasi-immortal leaders of Sanctum. They were founded by Gabriel Santiago, also known as the Old Man, who was once the Thirteenth Prime but rebelled seventy years before the present after recognizing the immorality of what the Primes were doing. Gabriel is known as a demon to the people of Sanctum and an almost mythical figure amongst his followers, having been missing for ten years. Unknown to the Children of Gabriel, Gabriel has been hiding amongst them as Xavier, a high-ranking and less extreme member of the organization, having been unwillingly resurrected in Xavier's body after his last host died. After the overthrow and death of most of the Primes, the organization moves back into Sanctum under the leadership of Nelson and pushes for the execution Russell Lightbourne, the last Prime. Due to many being abandoned as children, they are unaware of the identity of their families in Sanctum even if their parents are still alive as discovered by Nelson when he returned following the successful rebellion. Though Emori tries to reunite them with their families, the Children of Gabriel ally with the remaining Eligius prisoners and take hostages in an effort to reveal the truth. Wonkru, with the help of Sheidheda, manages to stop the uprising and takes the Children of Gabriel into custody.

The Disciples

A mysterious group from another planet called Bardo. Though human, not much is known about them or their origins except that they are fanatically religious in some manner and that their current leader is named Anders. After finding Skyring due to a message in a bottle sent through the Anomaly by Octavia Blake, they captured Octavia and Charmaine Diyoza, later formed some sort of deal with Diyoza's daughter Hope and turned Skyring into a prison planet for their unbelievers. They are first encountered on Sanctum when several members kidnap Bellamy Blake through the Anomaly and attempt to capture Echo and Gabriel Santiago while targeting Hope for death. Three members are killed by Echo, revealing that they are humans with advanced technology, but not much else. After discovering that Skyring is one of the other planets on the Eligius III colony mission, Gabriel suggests that Bardo was another Eligius planet as well and that the Disciples are the descendants of one of the other Eligius mission teams who settled on Bardo like the people on Sanctum. It is later revealed that their full name is the Disciples of a Greater Truth and that they worship a mysterious figure called the Shepherd that saved them from the destruction of Earth. The Disciples believe in "the war to end all wars" which Clarke Griffin supposedly holds the key to winning. Disciple warriors hold rankings going up to at least Level 12 which appears to be a Master level. Of the named Disciples, Dev was a Level 7 while Orlando was a Level 12 who trained other Disciples and was on one occasion shown to be addressed as "Master Orlando". Gabriel, Echo and Hope later realize that the Disciples are not Eligius descendants but instead came directly from Earth through the Anomaly. Nathan Miller and Niylah later discover a sigil that suggests a connection between the Disciples and the Second Dawn doomsday cult that built the bunker that Wonkru survived in. Its later revealed that the Shepherd is Bill Cadogan, the founder and leader of the Second Dawn who has been kept alive in stasis by the Disciples.
In "Anaconda," its revealed that the Disciples were originally the Second Dawn cult who had started worshipping Bill Cadogan by the time that Becca Franko had arrived on Earth two years after the first nuclear apocalypse. By the time they left for Bardo, those faithful to Cadogan were already called Disciples and were able to open the Anomaly with the help of Becca and the Flame. Their belief in the "war to end all wars" comes from Becca finding a combination using the Flame that showed her Judgment Day, the true end of the human race. However, they need the Flame, the key that they are searching for, to find the correct combination.
In "The Flock," its revealed that the Disciples train themselves to focus on the good of the community and not the individual. Rather than having families, the Disciples are grown from embryos in incubators during which time they can be perfected to remove various conditions. Their numbers are left limited however due to a lack of resources to maintain a massive population. The war that they believe is coming is with the enemy that destroyed the native Bardoans.

Main cast

Clarke Griffin

Portrayed by Eliza Taylor, Clarke Griffin is the daughter of Abigail Griffin and Jake Griffin, and the effective leader of the 100 for much of the series. Her backstory is that she was imprisoned as an accessory to the crimes of her father after attempting to inform their people that the Ark was dying, and thus ended up among the 100. Down on the ground, she tries to ensure the 100's survival by assisting in the acquisition of food and resources, and she also continuously serves as their main medic before her mother and the other medical staff join them on Earth. She is portrayed as relatively benevolent, but has been shown to act ruthlessly to fight or kill in order to protect her people if there are no other options, and she possesses natural leadership qualities with the help of Bellamy. They learn to love each other. After killing the entire Mountain Men population to save her fellow Sky People, Clarke becomes known in Trigedasleng as Wanheda and is sometimes also called Mountain-slayer. Clarke becomes gradually hardened and matured by her experiences on Earth, namely the acts she has been forced to commit to survive and protect her people. This transforms her into a strong but personally troubled heroine in the series, as she continues to struggle to reunify humankind by maintaining the uneasy peace between the Arkers and some of the Grounders, and between groups among her own people. On February 28, 2015, the series creator Jason Rothenberg confirmed that Clarke is bisexual; this makes her the first openly bisexual lead character on the CW network. In the sixth season, Clarke's body is possessed by the consciousness of Josephine Lightbourne, but Clarke herself survives a mind wipe due to a remnant of the A.L.I.E. AI. Josephine later relinquishes control to Clarke to escape a decapitation though the two continue to share her body. After Josephine manages to remain inside of Clarke's body even after the Mind Drive is removed, Clarke destroys Josephine's consciousness for good and regains full permanent control of her body. Shortly afterwards, Clarke loses her mother when Abby is mind-wiped to become the new host for Josephine's mother, Simone. Clarke is subsequently forced to blow Simone and anything left of Abby into space in self-defense, something that, along with her adopted daughter Madi becoming possessed by the Dark Commander, causes her to almost commit suicide,but Penelope 2comes back and saves her life.

Bellamy Blake

Portrayed by Bob Morley, Bellamy Blake is the Co-leader of the 100, leader of the Skaikru and The Heart in the lead dynamic of the show. He's also Octavia's brother and the best friend, soulmate of Clarke Griffin. He professes a strong determination to protect his sister, spanning from her birth. He often says "my sister, my responsibility". He was the leader of the 100 and described as the one who inspires masses. He's often inspired by Clarke after a tumultuous start to their relationship. He and Clarke develop a mutual respect and learn to compromise for each other's methods. He still feels guilty for his mother's death.
In the second season, he went undercover in Mt Weather, which was a huge risk, to save 40 of his people who were held captive to extract their bone marrow. In the end he along with Clarke were able to save all of their people although they had to pull the lever that radiated all of the people in Mt. Weather after the betrayal by Lexa.
In the third season, he saw Clarke while she was a prisoner of Roan. In order to save her he took a huge risk by dressing as a grounder and crossed an army of grounders in order to retrieve Clarke but his attempt resulted in him being knocked out. Clarke sacrificed her freedom to prevent him from getting killed. He was manipulated by the new Chancellor after Azgeda bombed Mt Weather, killing 49 people, including his girlfriend. In the process, he betrays Marcus Kane and put the whole of The Ark at risk of death. The bombing was made possible because Bellamy trusted Echo, the Grounder he saved in the previous season in Mt Weather. He listened to the false information she delivered in order to save Clarke. After Pike's election, Bellamy is one of the nine guards that carry out the chancellor's orders to kill the 299 Grounder warriors sent by Lexa.
Bellamy soon feels guilt for his actions, and while he saves Indra's life, this puts a rift between him and Octavia, as well as Kane. He remains one of the few people not taken over by A.L.I.E., and fights alongside Octavia and Pike to stop her.
In season 4, he saved his people, including Riley, who were held as slaves by an Ice Nation gang. His determination to save his people often puts him in danger. Afterward, he reconciled with Kane. He is often on the grounders' side, feeling it is selfish for the Sky People to hog all the places in the bunker. In S4 finale he had to leave Clarke behind on the ground in order to reach the Ark.
In the fifth season, it is revealed he survived on the Ark in space. After being reunited with Octavia, he feels he does not recognize her anymore due to her brutal and unforgiving ways, but still tries to get through to her. It was also his idea to try and take the cryogenically frozen prisoners hostage and have leverage with Diyoza in order to save Clarke. He also made Madi realize that they had made mistakes and asked her to forgive the Eligius crew and they all boarded the ship at his request. Also, his denial to board the ship without all of his people on board indicated his PTSD regarding leaving Clarke behind in S4 finale. He also poisoned his own sister to spare Clarke's life thus indicating a shift in his priority.
In the 6th season he's still feeling guilt over Monty and Harper's along with several of his friend's death which resulted in a conflict between him and Echo. When Clarke was body-snatched by The Primes it was him who recognized it wasn't her in Clarke's body which resulted in him being knocked out. He's also the one who learns Clarke is still alive inside her Brain based on the Morse code. He risks everything and everyone's life to save Clarke and his relationship with Clarke was described as weird by Josephine. In the end he performed CPR and desperately asked Clarke to fight for her life which resulted in her revival. In the season finale he watched in horror as Octavia was snatched from his hands by the anomaly.
In the seventh season, Bellamy is abducted by the mysterious Disciples through the Anomaly, chased by Echo, Gabriel Santiago and Hope Diyoza.

Cece Cartwig

Portrayed by Kelly Hu, Callie "Cece" Cartwig is the best friend of Abigail Griffin as well as the Ark's communications officer. Callie is first seen talking to the people on The Ark about the 100 going down to Earth. She said that she cannot confirm or deny anything at the moment. When Callie comes to know that Abigail Griffin is going to be executed she goes up to Marcus Kane to tell him that he is out of his mind and he cannot kill everyone who disagrees with him. Callie says that Abigail is her friend leaving Kane to reply that he cannot do anything to stop it. Kane and Callie share a close moment. She tries to implore him to give Abby amnesty, asking him to think of their own relationship. He answers by saying that no matter what he feels, he cannot. When it is time, Callie breaks into tears walking with Abigail to the place where she will be executed, embracing her and refusing to let go even at the behest of the guards. Abby asks that Callie watch out for her daughter before she dies. When the door is about to close Chancellor Thelonious Jaha demands the execution be stopped immediately. Callie is thrilled for Abigail, able to hold her friend again. Jason Rothenberg revealed that Hu was dropped after the first episode due to budget reasons.

Abby Griffin

Portrayed by Paige Turco, Abigail "Abby" Griffin is Clarke's mother. She is the chief medical officer of the Ark and the main proponent regarding the habitable status of Earth. Her husband was the chief engineer, Jake Griffin. She was a member of the Council led by Chancellor Jaha on the Ark before being stripped of her title, though she regained this position shortly afterward. Upon her arrival on Earth, Abby was Chancellor for a time when Marcus Kane gave her his pin. During this time she ruled autocratically, refusing to let Kane take over again on his return and betraying her former friend Jaha by putting him in prison. Abby becomes friends with Raven Reyes when she needs her mechanical expertise to try to get more information on what the 100 is dealing with on the ground. She begins to like the young engineer due to her reminding her of Clarke. Abby's relationship with her daughter became strained following Clarke's discovery of her mother's betrayal to her father which led to his execution. It only became more complicated once Abby and the rest of the people from the Ark joined the 100 on Earth, as they were both the leaders of their respective groups of people. Abby continues to work as the resident doctor in the newly established Sky People colony known as Arkadia and has supported Marcus Kane's campaign for peaceful cohabitation with the Grounders, putting her at odds with the anti-Grounder factions within their people.
In season six's "Adjustment Protocol", Abby becomes a Nightblood to help save Clarke's adopted daughter Madi. Abby is subsequently mind-wiped by Russell Lightbourne, effectively killing her and her body becomes the new host for Simone Lightbourne. In "The Blood of Sanctum", Clarke holds out hope that Abby survived in the same way that she did, but Russell confirms that Abby is truly gone. After a failed attempt by Simone to pose as Abby, Clarke blows Simone and several others out into space, killing them all. Abby's body is last seen floating away into deep space. In "From the Ashes," Clarke struggles with Abby's death while Murphy struggles with guilt over his role in it. Russell later returns Abby's things to Clarke in an attempt to get Clarke to kill him.

Finn Collins

Portrayed by Thomas McDonell, Finn Collins is a caring teenager who is always looking for fun and a peaceful solution. He is more interested in helping others than seeking vengeance. He was arrested for being a spacewalker and wasting the Ark's limited oxygen supply, but it was revealed that he was innocent and had taken the fall for Raven, his girlfriend, to ensure she did not ruin her engineering career or get floated. Originally Clarke's love interest, Finn's relationship with Clarke starts collapsing when she discovers his relationship with Raven. His romances with both girls ultimately end, but Finn and Clarke still love each other, and Raven still loves Finn. In the second season, his fear that Clarke has been killed by her captors in addition to the hardships he has endured cause him to become unpredictable and violent. He murders eighteen unarmed Grounders who he believed had taken Clarke hostage, and was willingly going to leave several fellow Arkers for dead in favor of continuing his search for her. As a result of his actions, the Grounders demanded retribution before they will agree to a truce between them and the Sky People, leading Commander Lexa to sentence Finn to death by a thousand cuts. However, he was mercifully killed by Clarke to prevent the Grounders from slowly and painfully killing him, though he did appear one last time during Clarke's grief-induced hallucinations.

Wells Jaha

Portrayed by Eli Goree, Wells Jaha was Clarke's childhood best friend and the son of Thelonious Jaha, who was the Ark's Chancellor at the start of the series. He is despised by some of the 100 upon landing on the ground because of his father. He intentionally committed a crime when he found out about the imminent launch of the delinquents to Earth so as to join the group in the hope to protect Clarke, for whom he harbors feelings. Clarke believed he was the reason her father is dead, only to find out later that her mother was the one who betrayed her father, and Wells willingly took the blame to prevent Clarke from hating her. On the ground, he is hardworking and thoughtful, volunteering to dig graves and collect rainwater to aid their newly established colony. It was his expert knowledge of botany that made him a valuable ally to Clarke, as she was tasked as the 100's medic due to her previous experience as the daughter of a doctor and needed herbal medicines to treat the ill and injured members of their community. He was murdered by Charlotte in the third episode, who wanted retribution for his father's execution of her parents on the Ark. He appears once again in the second season, when a hypoxic Thelonious hallucinates that Wells is alive and with him on the Ark, when everyone else has left for the surface. When Thelonious falls under A.L.I.E.'s influence, he forgets about Wells and has to be reminded by A.L.I.E., causing Abby to realize that something is wrong with him.

Octavia Blake

Portrayed by Marie Avgeropoulos Octavia Blake is Bellamy's younger sister – a rare relationship given the Ark's one-child rule. She was kept a secret by her family, living under the floor to avoid detection by authorities, but was eventually caught when Bellamy snuck her out of her room to attend a masked ball. Once discovered, some of the detainees discriminate against her for being a second child and thus an outcast to the Ark's dystopian society. She is a fiercely independent girl who is constantly rebelling and getting attention from men, most notably the Grounder Lincoln. However, just like Clarke, she is not exactly built for war so she is horrified at what she sees and experiences at first. In the second season, she becomes more immersed in Grounder culture and serves as Indra's second. Originally she felt hatred towards Clarke for being the daughter of someone in the same council who had her locked up. It is intensified when she discovers Clarke knew about the bombing of Tondc, did nothing about it, and allowed all those Grounders to die after the events of Mount Weather. She remains in her Grounder gear, and berates Lincoln for wearing an Ark jacket and for being naive as she still holds a grudge towards them. Eventually, Lincoln is brutally killed in front of her by Pike, causing a rift between her and Bellamy. In the fourth season, she shows more signs of being bloodthirsty after killing an ambassador who questions Roan's leadership. This new violent attitude earned her the nickname Skairipa or Death from Above. After refusing to kill Illian and getting close with him she decides to drop the act and take him home. She later accepts the fact that she is a killer and will fight in the Grounder battle for the bunker alongside Trikru, in which she is victorious after killing Luna, and becoming the acting leader of all 12 clans by telling them they will share the bunker. She finally forgives Bellamy for Lincoln's death after he opened the bunker realizing that he would put his own life in danger just to save her and the Grounders. She later protects Nilyah and further solidified her role as new leader by saying if Skaikru does not choose the 100 people to stay in the bunker then she will kill every Skaikru member. In the season finale, she officially becomes the new leader of the new Grounder tribe consisting of Skaikru, Trikru, Azgeda, and other Grounder clans, regardless of her blood and what is in her head.
In the fifth season, although still reluctant on being the leader, she tries to make peace with everyone. Eventually, overpopulation prevents from any real peace inside the bunker, so Octavia takes matters into her own hands and kills anyone who defies her or questions her view of what peace should be. Thus covering herself in their blood and being told by Gaia that it is best she keeps the blood on her, thus becoming Blodreina and decides anyone who breaks her laws must compete in deathmatches. During two years in the bunker, Abby's actions caused Octavia to become more dark and hateful that led to her ruthless actions as ruler of Wonkru, including murdering anyone who tries to defect, killing some of her own people in order to force them to stay alive when the only source of protein is their own dead, and culminating in her burning down the Hydrofarm in the bunker in order to force a conflict for the Shadow Valley rather than negotiating peace. Near the fifth-season finale, she later has a change of heart, after realizing that she broke Wonkru. In the season finale, a remorseful Octavia unexpectedly helps Abby save Kane's life after a confrontation between the two women in which Octavia appeared to be torn between leaving or killing Kane.
In the sixth season, she is exiled on Sanctum by Bellamy and works with Diyoza who was also exiled. After being poisoned, Octavia seeks healing from the mysterious Anomaly with the help of Gabriel Santiago. After being healed, Octavia decides to seek redemption for her actions and declares herself Blodreina no more. At the end of season six, Octavia is stabbed by Diyoza's adult daughter Hope and disappears into the anomaly again, leaving her fate unknown.
In the seventh season, its revealed that the Anomaly, which is a wormhole, had sent Octavia to another planet named Skyring where, due to time dilation from a black hole, Octavia lived for ten years with Hope and Diyoza, forming a family and finding peace. Eventually she and Diyoza were captured by a group called the Disciples and brought to another planet named Bardo where she formed a bond with a Disciple scientist named Levitt. Hope eventually rescued Octavia with Levitt's help and sent her back to Sanctum. However, as Octavia returned to a slower time dilated planet without one of the Disciples' protective helmets, she lost her memory of everything that had happened from the moment she left Sanctum. Before leaving, Levitt tattoos Hope's biometric code on Octavia's back so she can pull the young woman back to Sanctum later which is why Hope had appeared at the end of the sixth season. In the present, Hope reveals that she had only tagged Octavia with a locator tag so that she would be pulled through the Anomaly again and she is still alive. Having been returned to Bardo, Octavia witnesses Bellamy's apparent death before being rescued by Echo, Hope and Gabriel for whom five years has gone by after getting stuck on Skyring themselves.

Monty Green

Portrayed by Christopher Larkin, Monty Green is a smart and tech-savvy teenager who is a valuable asset to the teens on Earth due to his pharmaceutical and engineering knowledge. He and Jasper were arrested for making illegal substances. He is best friends with Jasper and is among the 48 held in Mount Weather; he eventually escapes and reunites with his mother in the third season. He tries to help Jasper recover from the traumatic events in Mount Weather. He eventually becomes part of Chancellor Pike's cause after his friend Monroe is killed by the Grounders. In the process, he gets Marcus Kane put in prison and Lincoln killed. He eventually betrays his mother and Pike in "Stealing Fire" by helping Kane, Octavia, Harper, Miller, and Sinclair escape by feeding members of the Ark Guard faulty intel and distracting them. In "Nevermore", Monty is forced to kill his mother—who had taken A.L.I.E.'s key—after she nearly kills Octavia. In "Red Sky At Morning", Monty has sex with Harper in Arkadia, and is forced to delete and essentially kill his mother for a second time by wiping her memory from the City of Light. In the fourth season, he comes up with the idea of protecting his people by shielding Arkadia with a hydrogen generator and recruits Bellamy, Harper and Miller to procure it. When they do, they blow it up to rescue the slaves taken by the Ice Nation. There he learns that the Chief had killed his father and, instead of Monty killing him himself, he allows the slaves vengeance by freeing them. After realizing that Harper chose to stay behind in Arkadia, he decides to stay with her until she changes her mind; she is eventually convinced and they search for more people to recruit. In the fifth season, he is still with Harper but feels guilty about killing his mother and letting Jasper commit suicide. By the end of the season, it is revealed that he died with Harper after growing old together and raising their son, Jordan. 125 years after they had entered cryo sleep, the survivors of Earth are greeted by Jordan, who shows them Monty's video logs, which reveal that Earth is completely uninhabitable, but that Monty had found them a new habitable planet on which to live.
In the sixth season, though he is dead, Monty returns as a manifestation of Clarke's mind in "Nevermind". Monty appears as Clarke is giving up the fight to encourage her to keep going and helps Clarke access Josephine's most traumatizing memory in an effort to regain some control over Clarke's body. Though they fail to stop Josephine, Monty helps Clarke send Bellamy a Morse code message, revealing that she is still alive by discreetly taking control of one of Clarke's fingers.

Jasper Jordan

Portrayed by Devon Bostick, Jasper Jordan is a goofy and geeky chemist. He is Monty's best friend. After his capture and subsequent rescue from Grounders, he becomes traumatized by his near-death experience which he struggles to overcome. Early in the series, he has a crush on Octavia, even saving her life during an animal attack, but she offers her friendship in return instead. He was one of the delinquents' camp's gunners and is among the 48 held in Mount Weather, and becomes an acting leader of his surviving people in Clarke's and Bellamy's absences. Jasper later becomes romantically involved with a Mount Weather resident, Maya who was later killed. In grief, Jasper becomes an alcoholic and he is disgusted that his own people would steal from Mount Weather after the war with its inhabitants as well as hating Clarke. Monty and Octavia struggle to help Jasper to cope with his loss, but although Jasper was briefly tempted by the City of Light tablets, when he realised that they erased all good memories relating to painful topics, he refused to take one, even breaking Raven out of Camp Jaha and taking her to Clarke and other escapees for medical treatment to remove the chip. It is revealed that he has been chipped while on Luna's oil rig and turns on the 100 under A.L.I.E.'s command. He is freed from her control once she is defeated. In the fourth season, he attempts suicide only for Raven to tell him they only have six months to live. He eventually commits suicide by remaining at Arkadia and taking an overdose of hallucinogenic nuts, convincing several other people to join him. Monty attempts to save Jasper as the death wave approaches, but can only be at his side as he dies. In the fifth season, Clarke recovers Jasper's goggles and suicide note from the ruins of Arkadia and Monty learns that Jasper had been intending to commit suicide since he emerged from the City of Light and held a belief that they ruin everything around them. Monty and Harper later name their son Jordan Jasper Green in Jasper's honor.

Thelonious Jaha

Portrayed by Isaiah Washington, Thelonious Jaha, commonly referred to as "Jaha" is Wells' father and the former Chancellor of the Ark. Jaha, along with Marcus, were best friends with Jake Griffin and his family. However, his and Marcus' friendship with the Griffins deteriorates after Jake's death and Clarke's subsequent arrest but he manages to maintain his friendship with Abby. He loses his power while on Earth as he clashes with Abby and Marcus over their views on the Grounders in addition to the unconfirmed destination, the "City of Light". Along with Murphy, he leads a small group of his followers from Camp Jaha to find the city. Having discovered A.L.I.E., the artificial intelligence that controls the City of Light, Jaha has become the delegated leader of A.L.I.E.'s cult, manipulating others into joining to escape the pain of daily life. Jaha is unconcerned about the side-effects even when presented with clear evidence that the City of Light erases even good memories to spare the users from psychological pain, such as Jaha having lost all memory of his son, he is soon freed from A.L.I.E.'s control after her defeat. He becomes guilt-ridden after he sees all the casualties in Polis due to him feeding everyone a chip. In the fourth season, he assists Clarke in being a leader for her people such as suggesting they find shelter in a lost bunker, only to discover it could not hold out radiation. Jaha tells everyone that if they want to survive the second nuclear explosion they must earn a lottery pick to ensure they will be on that list. He eventually comes to the realization the bunker was a decoy and the real one is in Polis, the Grounder capital, so he decides to recruit Gaia on what she knows about the symbol on the token and eventually learns it is a key to open the bunker. He eventually finds it and successfully opens it, he takes a child after promising his father to take care of him. In the fifth season, he is stabbed by an Azgeda Warrior and dies in front of Kane, Abby, and Octavia.

Marcus Kane

Portrayed by Henry Ian Cusick, Marcus Kane is one of the Councillors on the Ark. When Thelonious Jaha was Chancellor, he was second-in-command. He, along with Jaha, were friends with Jake Griffin and his family, but his friendship with them did not last after Jake's execution and Clarke's subsequent arrest. Though he initially supports population culls to extend life on the Ark, when Earth is shown to be survivable, he is guilt-stricken and works with everyone to survive in hopes of making amends of his past misdeeds. This, in addition to his mother's influence and death, affect his later actions of seeking peaceful and compromising solutions when governing his people after arriving on Earth. In the process, he gains allies who respect his new approaches, rebuilds his friendship with Jake's wife Abby Griffin, and earns the Grounders commander Lexa's trust. Kane aligns himself with Abby, who becomes Jaha's successor. In the fifth season, six years after Praimfaya he takes the fall for Abby's crime and proceeds to fight in gladiator battles but refuses once Octavia shows signs of being a dictator. After being severely injured in the fifth-season finale, he is put into stasis and remains there in the sixth season after a failed attempt to save his life. Kane's mind is eventually transferred into the body of a young man named Gavin to save his life, erasing Gavin's mind in the process. In "What You Take With You", Kane decides to commit suicide rather than continuing to live in someone else's body. After awakening Indra and leading a coup against the Primes on Eligius IV, Kane says a final goodbye to Abby before having Indra blow him out of an airlock along with the new Nightblood serum. In "Adjustment Protocol", when Abby is mind-wiped to become the new host of Simone Lightbourne, she remembers Kane in her last moments alongside her daughter and deceased husband.

Raven Reyes

Portrayed by Lindsey Morgan, Raven Reyes is an ambitious zero-gravity mechanic when on board the Ark who is not afraid of anyone or anything. She later collaborates with Abby Griffin in her escape from the Ark and launches herself in a pod to Earth, and occasionally advises Abby in the fields of electronics and mechanical engineering after she becomes chancellor on Earth. Brave and intelligent, Raven leads the camp in setting up communications and making bombs. She was childhood friends with Finn and was in a relationship with him until he fell in love with Clarke. It is revealed in the second season, that Finn took the blame for Raven's crime because she was already 18 and would be floated. She was the first zero G mech student under the age of 18 in 52 years. While she was originally rejected due to medical reasons, leading to her illegal spacewalk, Jacapo Sinclair overrode the decision due to Raven's talent.
In the third season, with Abby's help, Raven begins recovering from the injuries she sustained from last season. She joins Jaha's cause after reluctantly taking a tablet given to her by him, she does begin to fight the side effects after Jasper reminds her about Finn. She is soon saved by Clarke and freed of A.L.I.E.'s control using an EMP device that Raven herself had designed and that Sinclair had finished for her. Retaining the intelligence she gained from the AI, Raven helps discover her weakness and aids Clarke in destroying her.
In the fourth season, she bonds with Luna for her loss and convinces her to help save everyone on Earth, she also forgives Murphy for shooting her in the spine. It is revealed that due to retaining a remnant of A.L.I.E.'s code, she is able to use 90% of her brain but developed a negative side effect that could cause her to have a stroke, possibly leading to her death. As she works on a way to recreate Nightblood, Raven experiences a series of hallucinations, including Becca who tempts her with the chance to spacewalk before she dies of her deteriorating condition. However, a hallucination of Sinclair helps Raven to come up with a way to purge the code and save her own life. By freezing herself to death, thus preserving brain function and remaining flatlined for fifteen minutes, Raven is able to "reboot" her brain, purging the code and restoring herself to normal. Afterwards, Clarke rescues her and requests she fly them to the Ark to escape the second Apocalypse which she agrees to do, and successfully able to fly them to space and finally was able to spacewalk again.
In the fifth season, Raven becomes an improved fighter being able to topple Echo in combat and plans to return to Earth. She soon notices another ship landing on Earth, and proceeds to follow it. She realizes that there are other life forms in cryostasis on the Eligius IV prison ship and decides to stay behind and lies about an escape pod so that Bellamy will not argue with her when she stays behind on Eligius IV. After returning to Earth, she forms a romantic relationship with the Eligius pilot Miles Shaw. Throughout the season, Raven is employed as a pilot by both her friends and the Eligius prisoners with their clashing priorities putting Raven and her friends at odds with Clarke. At the end of the season, as the one inhabitable valley left is destroyed, Raven and Shaw fly the survivors back to Eligius IV.
In the sixth season, Raven loses Shaw soon after landing on the new world, Sanctum, and becomes bitter and angry towards Clarke and Abby for their various decisions. When the Lee family from Sanctum seizes control of Eligius IV, Raven awakens Charmaine Diyoza from cryosleep and retakes the ship with her and Madi's help, leading to the deaths of all but one of the hijackers. Raven is left as the sole pilot of both the Earth group and Sanctum following the deaths of the Lee family, the one survivor, Kaylee Lee, later being murdered on Sanctum by Josephine Lightbourne. After Josephine, posing as Clarke whose body she has taken over, makes a deal with Abby to save Marcus Kane using the Mind Drive technology, Raven flies Abby and a group from Sanctum back to the mothership. However, she is horrified to learn that a young man will be sacrificed to resurrect Kane. Raven reluctantly helps Abby, not wanting Abby's death on her conscience from an ill-advised spacewalk of her own, but awakens Indra to help with the situation. Kane eventually decides to float himself and the new Nightblood, sacrificing himself to stop other people from being sacrificed. Upon returning to Sanctum, Raven is imprisoned and nearly burned at the stake before Murphy talks Russell Lightbourne out of it. Raven makes amends with Abby shortly before Abby's death to resurrect Simone Lightbourne and works to save Madi from the Dark Commander possessing her through the Flame. Raven is eventually forced to destroy the Flame to save Madi while Clarke manages to retake control of the ship after killing all of the Primes except for Russell.
In the seventh season, Raven works to help keep the peace between the various factions on Sanctum, partially by helping to guide Murphy and Emori in their assumed roles as Daniel and Kaylee Prime. When Sanctum's nuclear reactor begins to meltdown, Raven is forced to enlist the help of four of the Eligius prisoners to fix the cooling system while Murphy and Emori, protected by their own Nightblood, fix the reactor core. Having originally lied to the prisoners about the severity of the danger that they are in, Raven is forced to lie to them again when the radiation exposure proves to be more extreme than she anticipated which causes it to be fatal to the prisoners. Unwilling to trust the prisoners to do the right thing in the face of death, Raven forces Murphy to help them with the last of the repairs, unaware that one had already figured it out but was continuing anyway to protect his loved ones. With Murphy's help, the prisoners fix the cooling system at the last possible second, but all perish aside from the Nightblood-protected Murphy and Emori, leaving Raven devastated and haunted by the deaths that she had caused. Raven later teams up with Jordan Green to examine the armor of a dead Disciple, figuring out how to use it and learning that the mysterious Anomaly is in fact a wormhole. With her friends in danger, Raven uses the armor to rescue them, but is further haunted by having to kill eight people to do it so soon after the deaths she caused in fixing the reactor. Using the armor, Raven leads her friends on a rescue mission for Bellamy, Octavia, Echo and Hope, but accidentally directs them to the wrong planet, an icy world with no sign of any way to reopen the Anomaly back.

Lincoln

Portrayed by Ricky Whittle, Lincoln is a Grounder who rescues Octavia. The pair develop a romantic relationship, and Lincoln helps the 100 multiple times, causing him to be viewed as a traitor to his people. He later is drugged to become a reaper, but with Clarke's and Abby's assistance, he is successfully rehabilitated from the drug. Having been viewed as a traitor by some of his people, Lincoln resides in Camp Jaha with Octavia. He is put in prison by Pike with the help of Bellamy and shot by Pike after surrendering to save his fellow Grounders from execution.

John Murphy

Portrayed by Richard Harmon, John Murphy starts out as one of Bellamy's men and is generally disliked by the group due to his reputation of being a troublemaker and career criminal, making him one of the few members to actually have committed felonies and not petty misdemeanors. After being wrongfully accused by Clarke and nearly lynched, he tries to kill Charlotte. As a result of her suicide, he is banished from the camp. He later returns, surviving being tortured by the Grounders. He seems to have forgiven the 100, but he kills two and attempts to hang Bellamy and accidentally shoots Raven in the spine.
In the second season, he is rescued by Raven from a surrounding Grounder and expresses remorse for his actions. Murphy explains to Raven that his father was executed for stealing medical supplies to help Murphy when he got sick and his mother became an alcoholic who drank herself to death after blaming Murphy for her husband's death. Murphy helps the 100 as they search for their lost members, even saving Bellamy's life when he could have let him drop. As he is still disliked in Camp Jaha, he accompanies Jaha to find the City of Light. On the way, he befriends a Grounder named Emori who later betrays and robs the group. He eventually finds a lighthouse where he is trapped by Jaha and A.L.I.E. after watching a video that shows that A.L.I.E. caused the nuclear holocaust.
In the third season, he leaves the island after not wanting to be a part of Jaha's insane missions, and gets a boat ride from Emori. After Emori transports him and Jaha across the sea, he refuses to take the key and flees with Emori. They start robbing people in the Commander's Forrest and he is eventually captured by Grounder warriors and brought to Polis, as one of the captors discovers a chip in his pocket which has the "Sacred Symbol of the Commander". He is tortured for information by Titus and eventually tells him what he knows. After seeing an escape pod marked Polaris with the a and r burned off as well as drawings, Murphy pieces together the story of the First Commander Becca and her connection to The Ark. Later on, Titus tries to murder him and frame Clarke but accidentally shoots and kills Lexa. After she dies he witnesses Titus remove the chip. After Titus gives Clarke the chip and commits suicide, Ontari makes him the new "Flamekeeper" since he is the only other person to have witnessed it being removed from another person. Ontari takes a liking to him and wants him to sleep with her; if he refuses, she will kill him. He later reunites with Emori who is under A.L.I.E.'s control, and A.L.I.E. implies to her that Ontari's had sex with him. During the final battle with A.L.I.E., Murphy plays a vital part by manually pumping the brain-dead Ontari's heart to keep a blood transfusion to Clarke going so that she can use the Flame to destroy A.L.I.E.
In the fourth season, after the City of Light is destroyed and A.L.I.E.'s control over everyone dissolves, Murphy stays behind with Emori. When he finds out there's a nuclear disaster coming which will wipe out everyone on Earth, he and Emori decide to side with Clarke, who has a plan that might save 100 people. Murphy ends up helping Raven with another plan, and he is confronted with what he is put her through after he shot her. When Raven opts to stay behind, he has a rare emotional moment and shares a tearful goodbye with her. Murphy later retreats to the remnants of the Ark in space with Bellamy, Raven, Emori and Echo to survive the coming nuclear apocalypse.
In the fifth season, six years after Praimfaya, he breaks up with Emori and suffers from an inferiority complex. As they land on the Eligius ship before Bellamy and the others land on Earth, he decides to stay on the ship to protect Raven only for her to berate him by telling him she lied about the escape pod, much to his dismay. Murphy eventually returns to the ground where his skill in manipulation proves vital in causing a mass riot between the prisoners, though Murphy elects to stay behind as the others flee in order to help Kane rescue Abby. In the final battle, Murphy is badly wounded and elects to remain behind until Emori refuses to leave him as she loves Murphy too much to lose him. Unwilling to let Emori lose him, Murphy allows Monty to carry him to safety shortly before the last inhabitable valley on Earth is destroyed. Murphy recovers from his injuries under Abby's care and goes into cryosleep with everyone except for Monty and Harper for the net 125 years.
In the sixth season, Murphy allies himself with the Primes on Sanctum after being offered immortality for himself and Emori despite the Primes killing Clarke to become Josephine Lightbourne's new host. Murphy finds himself torn between his friends and immortality, particularly due to his fears of what awaits him after death. Murphy eventually proposes marriage to Emori who accepts. Though Murphy gains the chance to become a Prime and immortal, he turns his back on the Primes after losing both Abby and Clarke in favor of saving his people with Emori. Clarke, who survived and had been posing as Josephine, admits that she is proud of him, causing Murphy to realize that his friend is still alive. Murphy and Emori manage to rescue their friends and Murphy aids Gabriel Santiago in subduing the Sanctum citizens who have been driven insane by the Red Sun toxin, helping to prevent the massacre of innocent people as Murphy is the only one who can help Gabriel infiltrate their ranks in his guise as Daniel Lee. During this time, Murphy meets Zev, the male lover of Daniel. Murphy's reaction to Zev suggests that Murphy may not be strictly heterosexual, though this is unconfirmed.
In the seventh season, Murphy struggles with guilt over his role in Abby's death and remorse for his actions. Murphy reluctantly assumes the role of Daniel alongside Emori as Kaylee in order to help keep the peace between all of the volatile factions inhabiting Sanctum. After Sanctum's nuclear reactor begins to meltdown, Raven enlists the help of Murphy and Emori, who had both become Nightbloods in preparation for becoming Primes, to help her and four Eligius prisoners fix the problem. With their Nightblood, Murphy and Emori are able to fix the reactor core, though both suffer negative effects from the radiation. After the prisoners suffer a fatal dose of radiation, Raven, not willing to trust them to do the right thing when faced with certain death, lies to them and tricks Murphy into helping, relying on his sense of self-preservation. Murphy bonds with the prisoner Hatch who has already deduced the truth but like Murphy, is trying to protect someone he loves. Together, Murphy and Hatch manage to fix the reactor at the last possible second, though Hatch dies in the process. Murphy and Emori both survive due to their Nightblood, though it takes Emori longer to recover than it does Murphy. With the Faithful threatening self-immolation, Indra enlists the help of a reluctant Murphy to pose as Daniel again and talk them down. Upon seeing the Faithful about to sacrifice children, Murphy risks his own life to rescue the children, but in the process reveals his deception to Daniel's lover Zev. Nearly burned alive, Murphy is rescued when Emori and Indra bring in Russell to talk down the Faithful, with Russell reaffirming Murphy and Emori's covers. However, Indra realizes in the process that Russell's body has in fact been taken over by Sheidheda, the Dark Commander.

Roan

Portrayed by Zach McGowan, Roan is an Ice Nation fugitive who is tempted by Lexa to kidnap Clarke. He turns out to be Prince Roan, son of Queen Nia. He later becomes king of the Ice Nation after Lexa kills Nia for attempting to overthrow her. He supports Ontari as the new Commander and attempts to track down Clarke who has escaped with the Flame. Roan and Clarke instead form an alliance to give Ontari the Flame to help shut down A.L.I.E. but the plan fails and Roan is shot by Kane. He is rescued when Clarke and Abby take the bullet out of his chest. Echo tries to tempt him to kill Clarke for her crimes as well as secure his position as ruler of the 13 clans. However, Clarke gives him A.L.I.E. 2.0 in hopes that he will let her and her people live to save the planet from the nuclear explosion in 6 months which he accepts. Later, he learns that Skaikru seems to be protecting themselves thus ending the alliance. Clarke convinces Roan to share Arkadia until it explodes. He takes part in the challenge where each tribe sends a champion to fight for the position of the leader – who gets to decide which tribe survives in the bunker. He banishes Echo for trying to cheat in the tournament, and declines to fight Octavia, whom he respects. In the end he is killed by the Nightblood Luna, who drowns him.
In season 7's "From the Ashes," Roan reappears to Echo along with the real Echo as a hallucination due to Red Sun toxin. The two accuse Echo of being a killer and press her on who Echo is now, reminding Echo of her many mistakes.

Echo

Portrayed by Tasya Teles, Echo is a former Ice Nation Grounder who was trapped at Mount Weather. She saves Bellamy's life, which leads him to trust her and he helps her escape. She later betrays him and helps act out a plan that led to the destruction of Mount Weather. After the events in the City of Light she blames Skaikru for all the casualties and demands for Clarke's execution. She becomes a royal guard and the bodyguard of Roan, but is banished for her interference in the Grounder battle. She assists Octavia in trying to open the bunker, but Octavia will only help Azgeda and not her. She fights off Grounders who tried to kill Clarke and provides protection onward in exchange for her safety when the death wave hits. In the season finale, Bellamy talks Echo out of suicide and she joins Bellamy's group in retreating to the remains of the Ark in space. In the fifth season, six years later, she is romantically involved with Bellamy, and afraid to return to Earth, knowing that Octavia will want her dead. Once she returns to Earth, she is confronted by Octavia who reminds her of her banishment but gives her an ultimatum on spying on the people of Eligius IV in exchange for banishment being lifted, and Octavia executes several of her people in order to make her defection seem legitimate.
In season six's "Ashes to Ashes", it's revealed that the real Echo is long dead. The current Echo is her best friend Ash who was forced to kill Echo as a child and take her place by Queen Nia of the Ice Nation. In the same episode, Echo becomes a Nightblood after being injected with Madi's bone marrow, narrowly escaping being mind-wiped with the help of Gaia and Nathan Miller. Echo helps to build a rebellion against the Primes and joins her friends in trying to do better by saving as many people as they can from a psychosis-induced massacre created by the Primes releasing a toxin into the population. The group eventually succeeds, but in the aftermath, Octavia is stabbed by Hope Diyoza and vanishes into the mysterious Anomaly.
In the seventh season, Echo works with Hope and Gabriel Santiago to rescue Octavia and Bellamy who has been kidnapped by the mysterious Disciples. Following the Disciples through the Anomaly, in reality a wormhole, to the planet Skyring, the group becomes trapped when the message containing the code they need to continue on to Bardo is washed away. Due to the time dilation from a nearby black hole, time passes much faster on Skyring than on Sanctum, causing their friends to be initially unaware of how long they have been gone and the danger they are in. Echo, Hope and Gabriel are eventually forced to wait for five years on Sanctum for the Disciples to return for their prisoner Orlando in order to get a chance to reach Bardo. Orlando eventually agrees to train the group as Disciples to help in their rescue mission, but when the time comes to leave, Echo decides that they can't trust Orlando to help them on Bardo and abandons him on Skyring after killing all of the Disciples that they have subdued. As later revealed by Captain Meredith, Echo's betrayal caused Orlando to subsequently commit suicide. On Bardo, the three manage to rescue Octavia from the Disciples' memory capture machine, only to learn that Bellamy had been apparently killed a week before trying to rescue his sister himself. Grief-stricken and enraged, Echo brutally kills their hostage, ruining the plan to use him to help rescue Charmaine Diyoza.

Jordan Green

Portrayed by Shannon Kook, Jordan Green is the son of Monty Green and Harper McIntyre. During his time on Sanctum, Jordan builds a relationship with Nightblood Delilah Workman who becomes the host to Prime Priya Desai, resulting in Delilah's mind being completely wiped. Due to his love for Priya's host, Jordan shows a great deal of care for Priya who has no memory of him, saving her life when Madi, under the influence of the Dark Commander, begins murdering Primes. Jordan is severely wounded in the process, but survives and Priya sees to his recovery personally. After learning that Clarke survived the mind wipe to become Josephine Lightbourne's host, Jordan expresses hope that Delilah survived as well and becomes angry when his friends refuse to even try to save Delilah, unaware that Clarke had only survived due to her experiences with A.L.I.E. During the revolution on Sanctum, the Adjustors attempt to brainwash Jordan who is rescued by his friends partway through the process but is left in an unresponsive trance until the next morning. In the aftermath of the revolution, which left all of the Primes aside from Russell Lightbourne dead, Jordan chooses to remain on Sanctum to help clean up the mess, pointing out that while Sanctum wasn't perfect before they got there, it worked. Jordan is shown to have kept one of the Prime's Mind Drives, presumably that of Priya who was killed by Delilah's vengeful mother.
In season 7, Jordan attempts to act as an intermediary with the Adjustors and Russell. Despite undergoing the brainwashing, Jordan states that he doesn't believe in the divinity of the Primes and instead shows sympathy for Russell who he feels is simply a man who has lost his way. Though Jordan returns Priya's Mind Drive to Russell, the depressed and suicidal man destroys it instead. Jordan and Russell have a conversation about the mysterious Anomaly which Jordan finds himself drawn to due to the experiences he had under the influence of the Red Sun toxin. Having also been drawn to the Anomaly, Russell suggests that it is now Jordan's job to try to figure the mystery out. Jordan is eventually rejected by Russell's followers who dub themselves the Faithful while Sheidheda, who has killed Russell and taken over his body, manipulates Jordan as part of his own plans. Jordan teams up with Raven to examine the armor of a dead Disciple, having not seen her since they worked together briefly after Eligius IV arrived at Sanctum. Upon learning that the Anomaly is a wormhole and that Clarke is in trouble, Raven and Jordan rush to their friends' rescue with Raven using the armor to kill eight Disciples, something that leaves her disturbed. Having learned that their friends are trapped on another planet, Jordan joins Clarke, Raven, Miller and Niylah in traveling through the Anomaly in search of them.

Russell Lightbourne

Portrayed by JR Bourne and Sean Maguire, Russell Lightbourne is the leader of Sanctum. Originally a colonist from Earth and an astronomer, Russell fell under the influence of the first Red Sun Eclipse and slaughtered many of the other Eligus colonists, including his own daughter Josephine, in a psychotic state. Russell subsequently spent the next twenty-five years working with Josephine's boyfriend Gabriel Santiago to find a way to resurrect those that they lost, eventually succeeding through Mind Drives and Nightblood hosts and gaining a form of immortality. The original colonists became known as the Primes and ruled over the citizens of Sanctum, sacrificing innocent people in order to extend their own lives. However, due to moral concerns, Gabriel eventually abandoned the Primes to form the militant group known as the Children of Gabriel.
When the survivors from Earth arrived, Russell and the other Primes were initially welcoming, but this changed after Russell and his wife Simone learned that Clarke Griffin was a Nightblood. Desperate to resurrect Josephine and unwilling to wait potentially 56 years for their chance, the two mind wiped Clarke, apparently killing her and kept the secret of Josephine's return. The two enticed Abigail Griffin to help them make more Nightblood to make new hosts to deal with the dwindling population of Nightbloods despite having murdered her daughter by promising to help her save Marcus Kane. Unlike his wife, Russell initially showed remorse and hesitation over some of their actions, being visibly anguished while killing Clarke and genuinely remorseful when apologizing to Bellamy Blake while trying to make a deal with him. Russell was elated to learn that Clarke had survived, seeing the new Nightblood as a solution that would allow him to bring Josephine back in a willing host while restoring Clarke. However, under the influence of the Dark Commander, Clarke's adopted daughter Madi began slaughtering Primes and Josephine was unwilling to give up Clarke's body, instead desiring to get rid of Clarke for good and keep her body. This led to conflict between the Primes and Earth survivors with Clarke's friends seeking out Gabriel to help free her from Josephine's control, though Bellamy intended to trade Josephine's Mind Drive to Russell for peace. After Clarke's friends began fostering rebellion, leading to Simone's death, Russell abandoned all restraint and nearly burned them at the stake before John Murphy offered a way to restore the Primes using bone marrow transplants to recreate Nightblood. Russell sacrificed Abby to be the new host for Simone and unleashed Red Sun toxin to turn Sanctum's citizens on each other while the Primes fled the planet. Having killed Josephine and been posing as her, Clarke thwarted the Primes' plan to mind wipe Wonkru and blew all of the Primes except for Russell into deep space while her friends managed to stop the fighting on Sanctum. Russell allied himself with the Dark Commander to get revenge upon Clarke, but Madi regained control and had Russell arrested for his crimes.
In "From the Ashes," a depressed and suicidal Russell has refused to eat, drink or sleep since his arrest while the various factions of Sanctum clamor for either his release or execution. Apparently disillusioned with his former image of a living divinity, Russell destroyed Priya's Mind Drive before discussing with Jordan Green the mysterious Anomaly that they were both drawn to. When Clarke sought his help to calm the factions, Russell purposefully goaded Clarke with her mother's memory in an attempt to get Clarke to kill him. Though nearly successful, Clarke knocked Russell unconscious instead. Russell awakened in a Mindspace in his original form where he was greeted by Sheidheda, the Dark Commander who had downloaded himself into Russell's Mind Drive when the Flame was deleted. The Dark Commander slit Russell's throat, killing him and destroying Russell's consciousness. With Russell gone, Sheidheda resurrected himself in Russell's body and began pretending to be the deposed Prime. Jason Rothenberg confirmed that Russell will stay dead and will not return to battle Sheidheda for control of his body as happened with Clarke and Josephine. Though Sheidheda initially is successful in posing as Russell, Indra realizes the truth in "Welcome to Bardo" and has Russell's Mind Drive removed from his body so that Sheidheda can never be resurrected again.

''Sheidheda''

Portrayed by Dakota Daulby and JR Bourne, Sheidheda, also known as the Dark Commander, was a former Commander and leader of the Grounders. However, unlike most of the other Commanders, Sheidheda was pure evil, killing his first three Flamekeepers, anyone who wouldn't bow to him and their entire families. As a child, Indra once saw the Dark Commander in action on Trikru land. Indra's father died in the battle while her mother bowed to Sheidheda. Eventually, the Dark Commander was killed by his fourth Flamekeeper. Like the other Commanders, Sheidheda's consciousness survived in the Flame and he would attempt to influence each new Commander to evil. However, the Commanders and their Flamekeepers had a Separation Ritual which would call upon the Spirits of the Commanders to seal Sheidheda away from each new Commander.
In the sixth season, new Commander Madi Griffin began to see Sheidheda after arriving upon Sanctum. Initially able to resist the Dark Commander's influence at first, Madi eventually began to see him in the waking world. Concerned, her Flamekeeper Gaia had Madi attempt the Separation Ritual, but it ultimately failed. After receiving word that her adopted mother Clarke Griffin had been killed in order to resurrect Josephine Lightbourne, Madi banished Gaia and agreed to follow the Dark Commander to get revenge against the Primes. Under his influence, Madi began assassinating Primes, killing Miranda Mason and nearly killing Priya Desai had Jordan Green not intervened. Due to Madi's actions and Bellamy kidnapping Josephine after learning that Clarke was still alive and trapped inside of her own body, relations between the Primes and the Earth people fell apart and they were imprisoned. Raven Reyes realized that the Dark Commander had somehow managed to trick the Flame's AI into protecting him and isolating the other Commanders. Raven realized that with Becca's notebook on the Flame, she could potentially get rid of Sheidheda for good. The Dark Commander was able to take full possession of Madi, particularly after Clarke returned posing as Josephine and claiming that Clarke was gone for good. With Madi's friends attempting to get rid of him, Sheidheda threatened to kill Madi if they tried to remove him from the Flame. When Raven attempted to get rid of him anyway, she discovered that the Dark Commander had added a kill code to the Flame that would get rid of him at the cost of destroying the Flame and the spirits of the other Commanders. After Clarke killed the other Primes, Sheidheda forged an alliance with Russell Lightbourne to get revenge, using Madi's control over Wonkru. However, Clarke was able to reach Madi who managed to retake control from Sheidheda and had Russell arrested. Enraged, the Dark Commander attempted to kill Madi, forcing Raven to activate the kill code and destroy the Flame. However, Sheidheda had anticipated this and manipulated the situation so that at least he and possibly the other Commanders were uploaded to another location.
In season 7, it was revealed that Sheidheda had managed to upload himself into Russell Lightbourne's Mind Drive when the Flame was destroyed. After Clarke knocked Russell unconscious, Sheidheda greeted him in a Mindspace resembling the location where he would meet with Madi. The Dark Commander slit the deposed Prime's throat, killing him and destroying Russell's consciousness. With Russell gone, Sheidheda was resurrected in the body of Russell's final host and preyed on Clarke's emotions to get her to save him from a fire. As the Dark Commander reveled in his resurrection, Clarke announced that "Russell" would be executed for his crimes the next day. Manipulating Russell's followers, Sheidheda was able to force an end to the execution or risk creating a martyr for the fanatics. After Sheidheda stopped the fanatics, now calling themselves the Faithful from executing Murphy, Indra realized who he really was from his behavior. Indra promised to kill Sheidheda herself when the time came and had Russell's Mind Drive painfully removed by Eric Jackson so that the Dark Commander could not be resurrected again when he dies. Sheidheda's resurrection is later revealed after he brutally slaughters most of the Faithful and Knight and another Wonkru guard bow before the resurrected Dark Commander.

Gabriel Santiago

Portrayed primarily by Chuku Modu, Gabriel Santiago was a geneticist and one of the original Eligius colonists on Sanctum and the boyfriend of Josephine Lightbourne. During the first Red Sun Eclipse, Russell Lightbourne fell into a psychotic state and killed many of the other original colonists, including Josephine. Gabriel himself survived and dedicated the next twenty-five years of his life to finding a way to bring back those they lost, particularly Josephine. Gabriel eventually discovered a way to resurrect the original colonists by implanting their Mind Drives into mind wiped Nightblood hosts, effectively granting them a form of immortality. The first to be successfully resurrected was Josephine herself. Josephine would later state that Gabriel had already been dying of cancer by the time that he succeeded and Josephine brought him back as she was unwilling to lose him either. Thanks to Gabriel, the original colonists became known as the Primes and ruled over Sanctum, using Nightblood hosts to resurrect themselves. However, Gabriel developed moral concerns about their actions, particularly sacrificing innocent people to save themselves and destroyed the Nightblood embryos in an attempt to stop the resurrections, escaping with the help of Ryker Desai. Over the next seventy years, Gabriel formed the militant group known as the Children of Gabriel, rescuing children sacrificed to the forest by Josephine and became known primarily as "The Old Man." Gabriel intended to die with his elderly host, but Eduardo, a loyal follower who was unwilling to let him go, resurrected Gabriel against his wishes in the body of Xavier, a free-born Nightblood amongst the Children of Gabriel. Out of guilt, Gabriel killed Eduardo and lived as Xavier, vanishing to his followers for the next ten years. Despite their differences in ideology, Gabriel never stopped loving Josephine in 236 years, something that Josephine admitted to reciprocating.
When the Earth survivors arrived on Sanctum, they came into conflict with the Children of Gabriel. During this time, Octavia Blake and Charmaine Diyoza met Gabriel as Xavier and he became interested in Octavia's connection to the mysterious Anomaly, something that Gabriel had spent over a century studying. With Octavia dying, Gabriel led the two to the anomaly with Diyoza deducing his true identity. Diyoza and Octavia entered the Anomaly, Diyoza vanishing to her apparent death while Octavia returned fully healed. Gabriel and Octavia attempted to determine the truth of Octavia's time in the Anomaly, instead leading her on a journey of self-reflection. After learning that Clarke Griffin was the host of the once again resurrected Josephine, Gabriel worked with Octavia and Bellamy to save their friend and was reunited with Josephine for the first time in decades. Despite his continuing love for Josephine and vice versa, Gabriel refused to let her sacrifice Clarke's life and attempted to safely remove Josephine's Mind Drive. After Josephine hung on inside of Clarke, Clarke was forced to kill her for good in self-defense to Gabriel's obvious grief. Gabriel's true identity became exposed to his followers and they worked together to stop the resurrection of the remaining Primes though Gabriel's haste foiled the original plan and caused chaos when Russell unleashed the Red Sun toxin upon the people of Sanctum. Gabriel worked with Clarke's friends, particularly John Murphy, to contain the chaos while Russell was arrested on Eligius IV and the other Primes were permanently killed by Clarke aside from Priya and Ryker Desai who died on Sanctum in the rebellion. After the rebellion, Gabriel discovered a tattoo on Octavia's back matching the symbols on the Anomaly Stone, a mysterious artifact connected to the Anomaly that he had been studying for over a century. When Gabriel and Octavia activated the artifact using the symbols, Diyoza's daughter Hope emerged from the Anomaly, stated that "he" had her mother and stabbed Octavia who vanished with the Anomaly.
After the disappearance of Hope and the kidnapping of Bellamy Blake by the mysterious Disciples, Gabriel joined Echo and Hope in traveling through the Anomaly in search of their friends, emerging on another planet named Skyring by Hope where time ran much faster due to time dilation and where Octavia had spent ten years with Diyoza and Hope before being captured by the Disciples. Hope was able to provide Gabriel with some answers about how the Anomaly, in reality a wormhole created by an alien race, worked and revealed that she had only injected Octavia with a locater tag to send Octavia through the Anomaly as per Hope's deal with the leader of the Disciples. On Skyring, Gabriel discovered the body of his friend quantum physicist Doctor Colin Benson and realized that Skyring was actually in fact planet Beta from the Eliguis III colony mission, though the mission had failed due to a transport ship crash that had killed all but Colin himself. Revealed to have kept Josephine's Mind Drive to be sure she was truly gone, Gabriel began using Colin's Memory Drive, the technology that Gabriel had first reverse-engineered the Mind Drive from, to search for the code to open the Anomaly to Bardo where the Disciples came from and which Gabriel suspected was another Eligius III colony world. Though successful in finding the code, a man imprisoned on Skyring by the Disciples destroyed Gabriel's computer before they could record the code for their use.

Hope Diyoza

Portrayed by Shelby Flannery, Hope Diyoza is the daughter of Charmaine Diyoza and Paxton McCreary.

Recurring cast

The Ark/Arkadia/Skaikru

Trikru (Tree People)

The Primes