List of One-Punch Man characters


The Japanese manga series One-Punch Man contains a number of fictional characters created by One and illustrated by Yusuke Murata. The series follows a superhero named [|Saitama] and his disciple [|Genos] who join the Hero Association so they can be recognized as such when they fight various monsters and villains. The Hero Association ranks all of its members by a Class and a ranking within that class. Characters listed are ones noted by the author in the manga profiles, ones that were highlighted in the anime character list, and ones that recur over several story arcs.

Main characters

Saitama

The title character, Saitama, is a bald-headed 25-year-old man who is bored of fighting because he is effortlessly able to defeat enemies with a single punch. He lives in an apartment in City Z. Three years prior to the start of the series, when he still had hair, Saitama was job hunting when he defeated a [|crab-like monster] that attempted to kill a child. Saitama says he became a hero "for the fun of it". His abilities mainly consist of physical abilities magnified to an immeasurable degree: speed, strength, stamina, and durability, which he attributes to a daily training regimen. Early in the series, he picks up a disciple and roommate Genos.
Though he had broken all the physical records in the Hero entrance exam by huge margins, Saitama enters the Hero Association in the lowest C-Class rank due to his miserable performance on the aptitude exam. He soon goes up the ranks by performing many deeds, although many of his efforts are not recognized because of collateral damage or higher-tiered superheroes receiving more credit. As of the current arc, he is A-Class rank 39. He does not mind letting others have the recognition though, as demonstrated in his actions following the fight against the [|Deep Sea King]. In the Dark Matter Thieves' story arc, he is unfazed by the telekinesis of a powerful esper, further displaying his resistance. This arc was also one of the only times he has used his "serious punch", defeating the world-conquering leader of the aliens, Boros. Through various circumstances, he forms friendships with Mumen Rider, Bang, King, and [|Blizzard]. His superhero name in the association is.
Saitama is voiced by Makoto Furukawa in the Japanese version and by Max Mittelman in the English dub.

Genos

is a 19-year-old cyborg who becomes Saitama's disciple after bearing witness to Saitama's easy victory over Mosquito Girl. Four years prior to the start of the story line, his family was killed by a rampaging cyborg. Genos was nearly killed in the attack and his body was destroyed so, to keep him alive to stop the rampaging cyborg for justice, a scientist named Dr. Kuseno took Genos in and modified his body to make him a cyborg with destructive capabilities. However, Genos remains steadfastly convinced that justice demanded vengeance against and destruction of the cyborg. His perfect score on the entrance exam for the Hero Association places him in S-Class, but he still considers Saitama to be his master and goes with him whenever he is not summoned to other missions. Saitama often has to save him, as Genos' headstrong personality causes him to jump into action without thinking. He lives with Saitama after offering a sizable down payment for his share of the rent. His superhero name in the Hero Association is
Genos is voiced by Kaito Ishikawa in the Japanese version and by Zach Aguilar in the English dub.

Hero Association

The Hero Association is a superhero organization founded by the multi-millionaire [|Agoni] in order to fight monsters, criminals, and various threats. It uses a Hero Registry to indicate which characters are recognized as professional heroes, with anyone who is not registered to be considered "a pervy freak who spouts irresponsible nonsense." Agoni created the association after his grandson was saved from the monster [|Crablante] by an unknown bystander. It is also financed by donations from citizens. The association is made up of four tiers from the lowest C-Class to the highest S-Class. The heroes within each class are ranked numerically, with the highest rank 1 of each class being eligible to advance to the next tier if they so desire. New heroes must take an exam in which 50% is a physical test, and the other 50% is a written exam and an essay. A passing grade would be 70% or higher and directly placed in a class from 70% being barely C-class to 100% being eligible for S-class. They are then placed at the lowest ranking for that tier. Heroes can ascend or descend in their rankings depending on their deeds; C-Class heroes who are inactive for a week are dropped from the Registry.

S-Class Superheroes

S-Class is the highest hero rank in the Hero Association. Those who have gotten a perfect score on the entrance exam as well as the top candidate from A-Class are eligible to enter this class. Besides Genos, the S-Class Superheroes in the series are, in rank order:

Blast

is the top superhero in the Hero Association. His whereabouts are currently unknown and is said to make himself known when a threat to humanity arises. Terrible [|Tornado] seems to be the only person to know who he is and what he looks like. Blast once fought Centichoro, a powerful, giant centipede, and brought it to the brink of death. He also fought the Ninja Village Leader at one point, ending with the Leader being rendered comatose for 15 years.

Tornado

, at rank 2, is the top female superhero, a petite 28-year-old woman with curly green hair, whose youthful appearance and short stature leads others to confuse her for a lost little girl. As an esper she can perform psychic maneuvers such as telekinesis and levitation. She has a younger sister named Blizzard. In the battle with the [|Dark Matter Thieves], she easily turns around a multitude of shells shot from a large alien ship back onto itself, dealing tremendous damage. Other espers are generally dwarfed by her overpowering telekinesis. She has a short temper and is often scolding people for their incompetence. Blast is the only individual who Tornado sees in high regards and she awaits his return.
In the anime, Tornado is voiced by Aoi Yūki in the Japanese version and by Marieve Herington in Season 1 and Corina Boettger in Season 2 of the English dub.

Bang

, who goes by the hero name, at rank 3, is an expert martial artist who runs a dojo in City Z. His martial arts style is the. His sole student is [|Charanko] as he had a former disciple named [|Garo] who beat down his other students until they quit. The incident is a painful memory for Bang and as a result, he constantly looks for new disciples to pass on his martial arts; Charanko is fairly incompetent, after all. As a hero, Bang is wise and displays a great deal of patience when compared to others in S-class and often scolds other heroes for being haughty or selfish. He is one of the first heroes to recognize Saitama's true power, witnessing him destroying a meteor on its way to wipe out Z-City. He has an older brother named Bomb who is a martial artist of the same caliber.
In the anime, he is voiced by Kazuhiro Yamaji in the Japanese version and by Will Barret in the English dub.

Atomic Samurai

, who goes by his hero name, rank 4, is a samurai hero who sports a kimono with an atom symbol on the back of it. He initially refuses to shake Saitama's hand as he isn't S-class, and when Saitama calls him "middle-aged", he replies that he is only 37. Atomic Samurai is highly skilled with his katana, being able to cut enemies down into millions of pieces in an instant. Within confined spaces, he wields his sword with such precision and speed that enemies are deatomized. He has several students who fill A-Class ranks 2, 3, and 4. He is part of a group called the Holy Order Of The Sword, along with Nichirin, Amahare, and Zanbai, each an exceptionally skilled sword-wielder.
In the anime, he is voiced by Kenjiro Tsuda in the Japanese version and by Kyle Hebert in the English dub.

Child Emperor

, rank 5, is a ten-year-old boy who wears a Japanese-style elementary school backpack.. He is a genius inventor who uses robots to fight as well as using his backpack to sprout spider-like legs that enable him to ambulate. In the bonus chapter "Numbers", he devises a mask which functions as a scanner for the heroes and monsters' power levels. In Vol. 12, he fights a giant Medusa-like monster Ganriki with one of his robots called Dogman. Various other gadgets have been displayed, each with a unique function tailored to fighting certain enemies. Though he is the youngest of the S-Class heroes, he displays a level of maturity exceeding most of his peers'.
In the anime, he is voiced by Minami Takayama in the Japanese version and by Sara Cravens in the English dub.

Metal Knight

, who goes by the hero name is a scientist who uses various remote-controlled robots to fight with high destructive capability. His robot first appears at Z City, where he tests a new weapon against an incoming meteor, but it fails while also turning down a collaboration with Genos. He is introduced as S-Class, Rank 7, but after being credited for stopping the meteor, advances to rank 6. He is absent at most S-Class meetings, but his robots often appear to salvage parts from destroyed enemies. Drive Knight advises Genos to be wary of Metal Knight, hinting at a connection between Dr. Bofoi and the cyborg that destroyed Genos' hometown. Dr. Bofoi reconstructs the Hero Association building into a fortress.
Metal Knight is voiced by Tesshō Genda in the Japanese version and by Taylor Henry in the English dub.

King

, ranked 7 at the time of the S-class meeting, is a hero with large claw-scars down the left side of his face. Genos believes that he is the strongest man on the planet and that the other S-class members show him great respect. In actuality, he is an ordinary 29-year-old otaku lacking superpowers and loves playing dating sims and fighting games. When King was younger, he was attacked by a Tiger-level monster which clawed his face. But when a younger Saitama defeated it, King was given credit, due to Saitama's lack of registration with the Hero Association. Other similar "victories" depicted show that Saitama and other circumstances cause high-level demons to die near him, and he often receives all the credit. As a result, he was placed in S-Class. King did not protest due to the S-Class perks and wealth, soon becoming one of the most popular heroes. King is often targeted by monsters and assassins; however, due to his luck, his enemies overestimate him and end up running away because of his presence. People have given his special technique a nickname, the "King Engine", which in actuality is his heart beating so loudly and quickly that enemies are scared away. Although Saitama knows of King's lack of abilities, he does not mind giving King the credit, instead encouraging King to keep inspiring people as an S-Class hero. King and Saitama become friends and often visit each other to play video games. As he was present at Saitama's past life where the latter saved his life, King is the only person from that time who remember Saitama had a hair once prior to receiving his powers cost of becoming bald.
King is voiced by Hiroki Yasumoto in the Japanese version and by Rich Brown in the English dub.

[|Zombieman]

, at rank 8, is a zombie hero with short black hair and wears a jacket. He is a practically immortal hero who can regenerate from any wound. It is later revealed that he was a former test subject of the [|House of Evolution]. His innate fighting abilities are nonexistent compared to those of the other S-Class heroes, so he utilizes his regeneration for unconventional tactics that pinpoint the opponent's weaknesses. Battles against him often devolve into wars of attrition.
In the anime, Zombieman is voiced by Takahiro Sakurai in Japanese and by Vernon Dew in English.

Drive Knight

, at rank 9, is a black-uniformed cyborg with a white mask face and a single eye. He is shrouded in mystery, since Genos asserted that nobody knows his true origins nor goals. In the battle with the Dark Matter Thieves, he warns Genos to watch out for Metal Knight as a possible enemy. Drive Knight uses a special box as his weapon, which he can reshape into "Tactical Transformations", each transformation a powerful weapon to deal with a certain type of situation.
Drive Knight is voiced by Yōji Ueda in the Japanese version and by Todd Haberkorn in the English dub.

Pig God

, ranked 10, is an extremely fat hero typically seen eating, dressed with a dark sweater and light pants.
He is shown to have superhuman durability due to his many layers of fat, as well as either a strong resistance or complete immunity to various poisons. Additionally, he can open his mouth to a ridiculous degree, often swallowing large enemies whole.
He is voiced by Daisuke Namikawa in the Japanese version and by Marc Diraison in the English dub.

Superalloy Blackluster

, ranked 11, is a dark-skinned bodybuilder superhero.
Not only displaying great physical strength, Superalloy Blackluster is the most durable superhero in S-Class. When other heroes of higher levels are shown to be wounded, Superalloy's skin appears to be undamaged. According to him, this is a result of intense bodybuilding making his muscles stronger than steel.
Blackluster is voiced by Satoshi Hino in the Japanese version and by Zeno Robinson in the English dub.
According to a Comicbook.com article, his anime character design in season 2 was criticized for being a racist caricature by viewers outside of Japan.

Watchdog Man

, at Rank 12, is a highly efficient and stoic hero in a dog costume who is charged with dealing with mysterious beings' activities in Q-City. He has a reputation of eliminating every last monster. He makes his appearance at the S-Class meeting, displaying his dog-like diligence. Watchdog Man has shown to be incredibly strong and an expert in dealing with monsters, despite his size and look. He often waits around like the Hachiko statue and sits atop of a stone pedestal waiting for a monster to come at him. Garou finds Watchdog Man difficult to assess as he is more of an animal than a human in his fighting style.
He is voiced by Yūji Ueda in the Japanese version and by Arnie Pantoja in the English dub.

Flashy Flash

, ranked 13, is a feminine-looking, high-velocity hero. His two hair ornaments and a symbol on his cloak look like number signs. He moves at extreme speeds, accurately using his sword on many distant targets at once. In addition to his sword skill, Flashy Flash is also a strong hand-to-hand combatant. His abilities stem from his extensive training in the Ninja Village. Eventually, it is revealed that he caused an incident at the Ninja Village that made him the strongest ninja the village had ever produced.
He is voiced by Kōsuke Toriumi in the Japanese version and by Lex Lang in the English dub.

Tank-Top Master

ranked 14,, is an athletic, tank-top-clad superhero who leads an army of his brothers who also wear tank tops. Unlike his brothers who are prone to arrogance and recklessness, he is level-headed, modest, and has a strong sense of justice. Tank-Top Master is shown to have extreme strength, being able to throw gigantic slabs of concrete at an alien ship to cause substantial damage. He has also developed his own form of fighting centered on his immense physical strength.
In the anime, he is voiced by Katsuyuki Konishi in the Japanese version and by Patrick Seitz in the English dub.

Metal Bat

, ranked 15, is a superhero sporting an indestructible metal bat and street fighting skills. He is assigned to be the bodyguard of a Hero Association patron [|Narinki] and his son. In addition to his equipment, he is shown to utilize superhuman physical strength and exudes a "fighting spirit" that lets him grow stronger as he sustains heavy injuries. Metal Bat has a large soft spot for his little sister often trying to appeal or spoil her. However, she often scolds him for his behavior, displaying a greater level of maturity despite their age difference.
He is voiced by Wataru Hatano in the Japanese version and by Sam Riegel in the English dub.

Puri-Puri Prisoner

is an openly gay superhero who prides himself in having a 10,000-year sentence for "getting grabby with men". He is usually dressed up in a prisoner's uniform with a useless ball and chain dragging behind him, and occasionally breaks out to capture criminals that he fancies, or if there are some men that he likes that are in trouble. He was at rank 16, but fell to 17 after Genos advanced. He powers up in a transformation called "Angel Style" which shows off his musculature, tearing his clothes apart, leaving him completely nude. He is shown to have great potential, learning ways to overcome opponents even in the midst of battle. He is a down to earth person, telling Saitama about the late-fortune teller and criticizing Amai Mask's treatment of the heroes' hardships.
He is voiced by Masaya Onosaka in the Japanese version and by Ray Chase in the English dub.

A-Class Superheroes

A-Class is the second strongest class of the Hero Association. Among the known A-Class superheroes are:

Amai Mask

is a beautiful model, singer, and actor, and the top superhero by popularity for over 28 weeks. He is very narcissistic, having a philosophy that heroes should be "tough, strong, and beautiful as well as be able to promptly and splendidly eradicate evil." He is also part of the promotion process for any rank 1 heroes who want to advance to the next class, although he mostly cares about those entering A-class or above. Despite his charismatic exterior, he has a strong hatred for anything deemed evil, and is rather merciless, executing Boros's captured subordinates on the crash-landed alien ship, even planning to kill the brainwashed victims. He chooses to remain at A-Class, rank 1, so as to prevent other A-Class members from applying to be S-Class without his blessing as mentioned by Hellish Blizzard when she mentions how Atomic Samurai's disciples can't join their master in S-Class. Unbeknownst to everyone, Amai Mask is secretly not entirely a human, as seen when his eye stabbed on one of the Monster Association member and his entire face revealed to be as thick as a hard material that can be broken, and never bleeds, while quickly regenerate, indicating there is something inhuman about him, even Atomic Samurai's disciples begin to be suspicious about Amai Mask's true nature since witnessing him execute surviving Dark Matter Thieves in cold blood.
In the anime, he is voiced by Mamoru Miyano in the Japanese version and by Ben Lepley in the English dub.

Snakebite Snek

, introduced as at the bottom of A-Class, Rank 38, wears a smoking jacket whose texture resembles the python's skin, and uses a hand-to-hand snake-styled fighting style. He facilitates the seminar welcoming Saitama and Genos to the Hero Association, and becomes irritated when they don't pay attention. He tries to fight Saitama afterwards and is easily defeated. In the J-City shelter, he and some other minor heroes are quickly defeated by the Deep Sea King. This, however, distracted the Deep Sea King until Genos arrived. He has participated in multiple martial arts tournaments, including the one that Saitama had entered.
In the anime, he is voiced by Shin-ichiro Miki in the Japanese version and by Kirk Thornton in the English dub.

and

A pair of A-Class heroes., introduced as rank 29, wears a skullcap and a letter jacket with his name on the front and the back. He often has a lollipop in his mouth. His weapon of choice is a slingshot, which he uses to fire golden balls made by a special metal that morph into bullets of various caliber and design., introduced at rank 33, wears a tuxedo and has a black mustache that he likes to stroke. He uses a rapier called Tomboy that can coil like a spring and that can extend several street blocks. He and Golden Ball cooperate on missions. They later face Garo, but are defeated. In the anime, Golden Ball's slingshot has a laser sight.
Golden Ball is voiced by Sota Arai in the Japanese version and by Kaiji Tang in the English dub.
Spring Mustachio is voiced by Makoto Yasumura in the Japanese version and by David W. Collins in the English dub.

Lightning Max

, or simply known by his real name, is a young prodigious karateka who wears a sports outfit and high-tech running shoes, has his hair slicked back to a point, and has a lightning symbol on his left cheek. He is ranked 20 in A-Class. He was called to City Z to look for the rumored monster in City Z after the creature had defeated Golden Ball and Spring Mustachio, but he came to the scene after it was already beaten by Saitama. He is among the superheroes that were defeated by the Sea King. In the Dark Matter Invasion storyline, he and Stinger assist Mumen Rider in a rescue operation. In the anime, he and Smile Man were sent to A-City at the start of the series to stop Vaccine Man, but are defeated. He later participates in the martial arts tournament, but is eliminated by Suiryu.
Lightning Max is voiced by Sōichirō Hoshi in the Japanese version and by Ben Pronsky in the English dub.

Stinger

is a popular fighter introduced as A-Class, Rank 11. He wears a tight black suit made of bandages. He wields a spear called Bamboo Shoot. In the battle against the Clan of the Seafolk, he takes down many Clan members until the Sea King shows up and defeats him. In the Dark Matter invasion storyline, he and Lightning Max assist Mumen Rider in rescue operations. Also, he fights Grizz-Meow in the "Lost Cat" side story. In the side story "Numbers," and in a later chapter, he is listed as rank 10.
In the anime, Stinger is voiced by Tomokazu Seki in the Japanese version and by Chris Hackney in the English dub.

Atomic Samurai's disciples

Atomic Samurai has three A-Class disciples. According to Hellish Blizzard, they would've joined their master were it not for Amai Mask:
B-Class is the next tier of superheroes in the association. If a superhero in C-Class reaches Rank 1, they have the option to be promoted to B-Class. The B-Class superheroes who have recurred in the series are:

Tank-Top Blackhole

, listed as rank 81, wears a black tank top and is one of the many brothers related to Tank-Top Master. He persuades the crowd to go against Saitama for damaging the town by shattering the meteor. He and Tank-Top Tiger then try to fight Saitama but are defeated. In the "Lost Cat" side story, he and Tank-Top Tiger were appointed to keep everyone out of a danger zone. He also joined the tank top fighters against Garo, but is defeated.
He is voiced by Atsushi Imaruoka in the Japanese version and by Joshua Tomar in the English dub.

Blizzard

, is a woman with short dark green hair and the top-ranking member of the B-Class heroes. She is in charge of a large faction within the Hero Association called the Blizzard Bunch. As an esper, she uses an "inborn psychic ability to defeat monsters". Her older sister is Tornado. She is notorious for recruiting members for her group, but while she appears confident and calm on the surface, she is actually very insecure and frustrated from living in the shadow of her older sister. When she was offered a chance to enter A-Class, she refused as she would have a much harder chance to advance there, and instead recruited others in B-Class believing their collective strength would help her. When the Monster Association launches an initial attack, she finds herself having to defend against her own Blizzard Bunch who were enslaved by a dominatrix-like monster. She overcomes being mind-controlled and fends them off with help from Tornado, causing the monster to retreat.
In the anime, Blizzard is voiced by Saori Hayami in the Japanese version and by Laura Post in the English dub.
Blizzard Bunch
The Blizzard Bunch is a large faction of B-Class Superheroes that are led by Hellish Blizzard. Some of Blizzard's notable subordinates in the Blizzard Bunch are:
C-Class is the lowest tier of the Hero Association. Members must regularly perform weekly heroic acts, usually those of helping civilians or fighting petty criminals. Those who are inactive for one week are removed from the Hero Registry. Among the notable C-Class superheroes are:

Mumen Rider

,, also known by his hero name,, initially listed as Class-C, Rank 1 is a bicycle-riding hero. He first appears against Hammerhead and the Paradisers, and although he is defeated, he is given credit for defeating them. He is a parody of Kamen Rider. Despite not being physically strong, Mumen Rider is compassionate and brave, often throwing himself into dangerous situations without hesitation in order to save others, even if it means his death. He befriends Saitama during and after the battle with the Deep Sea King, and is one of the first few heroes to acknowledge the latter's true strength. Unaware to both heroes, he and Saitama happened to attend a same middle school, where Satoru begin to act like a hero, calling himself a "Nameless Bicycle Commuter". During Dark Matter Thieves' invasion at A-City, Mumen Rider lead the rescue operations, accompanied by the A-rank heroes Stinger and Lightning Max. In a battle against Garo, he stops Tank-Top Master from injuring Garo further, although that enables Garo to counterattack and defeat Tank-Top Master as well as the entire tank top gang and Rider himself, then lastly, Bang's disciple, Charanko. He is visited by Saitama in the hospital, where they and by extend, Tank-Top Master discuss about Garo. When one of the Monster Associations invade the hospital where Mumen Rider and the rest of injured heroes are resting, Mumen Rider volunteer himself as a bait to lure the Monster into being trapped by Tank-Top Master's sneak attack. As the news of Monster Association's HQ being exposed at Saitama's neighborhood, Mumen Rider and the rest of the injured heroes begin to rush towards the battlefield where other heroes presented and rescue the civilians, despite knowing their current injured states.
In the anime, Satoru is voiced by Yuichi Nakamura in the Japanese version and by Robbie Daymond in the English dub.

Tank-Top Tiger

, introduced as C-Class, Rank 6, wears a tank top and hair colored in a tiger animal print. He accuses Saitama of being a villain because he was rushing around town searching for bad guys for the purpose of maintaining his C-Class position. However, he is defeated by [|Sonic]. He has several older tank-top wearing brothers who are in the association. After a giant meteor was destroyed by Saitama, Tank-Top Tiger and Tank-Top Blackhole confronted Saitama in front of a crowd of people. They tried to attack Saitama only to be easily defeated by him. In the "Lost Cat" side story, he and Tank-Top Blackhole were appointed to keep everyone out of a danger zone. He also joined the tank top fighters against Garo, but is defeated.
Tank-top Tiger is voiced by Hiromu Miyazaki in the Japanese version and by Chris Tergliafera in the English dub.

Staff members

Agoni

is the founder of the Hero Association; he appears as an old man in a business suit with an enormous cleft chin. Three years prior to the series, his grandson was attacked by Crablante but was saved by a passing stranger. He creates the Hero Association and the Superhero Registry to manage the superheroes who would protect humanity against supervillains, monsters, and other threats to the world.

Sitch

is the Disaster Prophecies Measures Committee Chairman for the Hero Association. He is a short, middle-aged man dressed with a dark smoking hair and a big nose. He is first seen in the Rumored Monster arc, discussing with other Hero Association members about the investigations being perpetrated by heroes in the various cities, in order to prevent eventual monsters activity. During the S-Class meeting, Sitch informs the S-Class members about the final prophecy of Madame Shibabawa, which predicted a disaster level "God" threat that will cause the destruction of whole humanity in the next six months. He later attempts to recruit potential superheroes from a group of criminals, but runs in trouble when Garo appears and declares himself to be the top villain.
Sitch is voiced by Nobuo Tobita in the Japanese version and by Kirk Thornton in the English dub.

Narinki

is a Hero Association Executive and prominent sponsor, having made contributions to cover 7% of the association's expenses. He is a short man with a big nose and large lips. He has a son named who also has his traits. He and Waganma are attacked by the Monster Association, and his son is abducted.
Narinki is voiced by Koichi Soma in the Japanese version and by Paul St. Peter in the English dub. Waganma is voiced by Ayaka Shimizu in the Japanese version and by Morgan Berry in the English dub.

Villains and monsters

The villains are classified by their bounties from C-class to A-class. The monsters in the series are categorized by five threat levels: God, Dragon, Demon, Tiger, and Wolf. According to the bonus manga "Threat Level", Demon is the equivalent of an S-Class hero, Tiger is A-Class, and Wolf is B-Class.

Vaccine Man

appears in the start of the story, a life-form spawned from the massive pollution of the earth who considered it his mission is to eradicate the virus known as humanity.
In the anime, Vaccine Man is voiced by Ryusei Nakao in the Japanese version and by Christopher R. Sabat in the English dub.

Crablante

is a mutant humanoid resembling a humanoid crab from the waist up. Originally a human, he transformed into Crablante because he ate too many crabs, and then went on a murderous rampage to get revenge on a boy who drew nipples on his chest while he was asleep. His defeat resulted in both Saitama's resolve to become a superhero and the boy's grandfather Agoni establishing the Hero Association.

Fukegao and Marugori

and are brothers who plan on conquering the world, known in the anime as the. Fukegao is a mad scientist with aspirations of world domination who creates an enlargement drink that transforms Marugori, who desired to become the strongest person on the world, into a mutated giant.
Fukegao is voiced by Takuma Suzuki in the Japanese version and by Kirk Thornton in the English dub. Marugori is voiced by Shinya Hamazoe in the Japanese version and by Bryce Papenbrook in the English dub.

Subterraneans

The are a race of underground creatures that rise to wreak havoc on the city early on in the series, destroying 70% of the population, with the being an especially powerful opponent. However, it is soon revealed that their formidable ability is actually something that Saitama was dreaming about, and that the actual race is very weak.

House of Evolution

The are a group created to further human evolution using genetic manipulation, and take over the world. It is led by Dr. Genus Following their defeat by Saitama, Genus and Armored Gorilla open up a takoyaki stand. It is revealed that S-rank superhero Zombieman was one of Genus's creations.

Mosquito Girl

is a voluptuous insectoid woman who can telepathically command mosquitoes within a range of 50 km to drain every living being in sight. She uses the blood acquired by the mosquitos to regenerate her limbs and become stronger. Genos had difficulty fighting her until Mosquito Girl was killed by Saitama.
In the anime, she is voiced by Miyuki Sawashiro in the Japanese version and by Cristina Vee in the English dub.

Doctor Genus

is a genius scientist and child prodigy who became disillusioned with humanity for being primitive in his eyes, later establishing the House of Evolution to "bring true humanity and evolution in the world" through genetic manipulation. When he was 70 years old, he made himself young and then created a number of clones to serve as his assistants.
Genus is voiced by Daisuke Namikawa in the Japanese version and by Ray Chase in the English dub.

Armored Gorilla

is a large cyborg gorilla. After being defeated by Genos, and discovering that Beast King was killed by Saitama, Armored Gorilla surrenders and reveals information about the House of Evolution, so Genos spares his life. Later, he helps Dr. Genus transform the House of Evolution into a takoyaki restaurant. In the anime, he makes a short cameo together with Doctor Genus when the Dark Matter Thieves attacked A-City, watching the report on TV. During the Monster Association attacks, he encounters Martial Gorilla who accuses him of assimilating with humans, but knocks him out when Martial Gorilla then attacks him. In the anime, he is voiced by Shōta Yamamoto in the Japanese version and by Kaiji Tang in the English dub.

Carnage Kabuto

is an insectoid rhinoceros beetle that is the House of Evolution's ultimate creature. He is dangerously powerful and smart, easily outclassing all of the other creations of Doctor Genus. Despite his level of intelligence however, Carnage Kabuto had been deemed mentally unstable by Doctor Genus, and as such, remained chained and imprisoned within the House of Evolution's basement. Carnage Kabuto was slain by Saitama.
He was voiced by Unshou Ishizuka in the Japanese version, and is voiced by Mike McFarland in the English dub.

Other House of Evolution creations

Other creations include:
is a leader of the, known in the original webcomic as, a terrorist group proclaiming that the society is corrupt because rich people grow fat while poor people die and have to work, although his real reason to start the group is simply not wanting to work. He is seven feet tall and weighs 462 pounds, and was known to have beaten 20 men at once. Although he is stabbed in the back of his head by one of Sonic's knives, he survives because of his thick skull. He has a hardened battle suit he stole from an unspecified organization, but it is destroyed by Saitama. After being defeated by Saitama and surviving an assassination attempt from the unknown organization representatives, he resolves to look for a job, and is seen in later chapters preparing for a job interview or filling out a job application.
Hammerhead is voiced by Wataru Takagi in the Japanese version and by Edward Bosco in the English dub.

Speed-o'-Sound Sonic

is introduced as a ninja bodyguard for the rich man Zeniru. He is deployed to fight the Paradisers. He warns them that when he fights, he kills his opponent. He is incredibly fast although Saitama and Genos thinks his full name is redundant, uses ninja weapons such as kunai throwing knives and a sword that can behead people and slice things. Although his first fight with Saitama results in his groin accidentally landing on Saitama's fist, he vows to return and defeat Saitama. He declares himself Saitama's official rival and challenges him many times throughout the series, but he almost always suffers some sort of embarrassing defeat. He was imprisoned as Prisoner 4188 but escapes with Puri-Puri Prisoner. When Sitch gathers villains to recruit for superheroes, he is one of the first to publicly decline and leave. He is the remaining ninja from his village Final 44. When he is recruited by Tempest Wind and Hellfire Flame to join the Monster Association, he accepts their Monster Cells, but since he had already cooked them, they were ineffective. It is revealed that both Sonic and Flash were once childhood friends, and Flash spared him out of respect for their friendships, feeding him with food poisoning. After he and Flash kills all members of Heavenly Ninja Party, they are gifted by Saitama each ultimate Ninja weapons confiscated from Ninja Village Leader's hand. Sonic and Flash end up having clashes each other over their respective point of view about Saitama, whereas Sonic plan to kill Flash after Saitama is dealt with. Sonic reveals his reason to resent heroes is particularly because of Blast massacres almost every juniors at Graduation Exam mercilessly in inhuman ways, with Sonic and Flash are one of the surviving juniors.
In the anime, Sonic is voiced by Yūki Kaji in the Japanese version and by Erik Scott Kimerer in the English dub.

Kombu Infinity

is a kombu monster who manipulates its tentacles like whips. Kombu Infinity travels to Z City, hoping to become a notorious monster and have a title like Ghost Town Monster. It easily defeats A-Class heroes Golden Ball and Spring Mustachio, but is defeated by Saitama who had randomly encountered him after a grocery shopping trip, and is stripped of all its tentacles to make kombu soup.
Kombu is voiced by Ami Naitō in the Japanese version and by Tara Sands in the English dub.

and others

The are a group of aliens that raid planets for their resources. They consist of:
is a self-titled and a former disciple of Bang before he was expelled for mercilessly beating up his fellow disciples, preferring to use his master's Fist of Flowing Water Crushing Rock technique as a last resort. As a child, Garo was a social outcast as he sympathized with monsters and saw heroes as bullies who prey on misfits. He also infiltrated a martial arts tournament by posing as a competitor named Wolfman whom he subdued and won using his identity. He first appears among an assembly of criminals which Sitch tries to recruit to support the Hero Association, defeating the A-Class heroes guarding Sitch and the criminals before hunting down random heroes including Tank-Top Master and his gang. He takes an interest in Hero Association profiles to plan attacks for their strengths and weaknesses, taking out Golden Ball and Spring Mustachio before being unknowingly knocked out by Saitama. Following his attacks on Metal Bat and Watchdog Man, the latter forcing him to retreat, Garo is injured by Saitama while attempting to attack King. Following being attacked by heroes while attempting to heal his injuries, he is taken to the Monster Association's base after he was nearly killed by Genos, Bang, and Bomb. Losing against Orochi in a one-on-one fight following his rampage throughout the Monster Association's lair, he was enchained until he was found by Puri-Puri-Prisoner.
In the anime, Garou is voiced by Hikaru Midorikawa in the Japanese version and by Greg Chun in the English dub.

Monster Association

The is a group of monsters who have assembled against the Hero Association, some of its members being humans that mutated from ingesting Monster Cells.
Some of its notable members include:

Kuseno

is a scientist of justice who transformed Genos into a cyborg. In the anime he appears as a strange old man in a lab coat, with grey hair styled in the shape of a mushroom cap. Though he supports Genos in the latter's quest to avenge his family and hometown, he also implies that he wishes for Genos to give up on revenge and work to protect people instead.
In the anime, Kuseno is voiced by Kenichi Ogata in Japanese, and by Doug Stone in English.

Zeniru

is a slightly rotund middle-aged multi-millionaire established in F-City, with a strange short curly type of hair. He wears an open bath robe, which reveals a hairy chest and a chain necklace. He hires Sonic as his bodyguard to take out the Paradisers, and allows Sonic to kill them.
He is voiced by Hiroki Gotō in the Japanese version and by Kirk Thornton in the English dub.

Shibabawa

is an old decrepit lady renowned for being a great fortune teller who resided in G-City, which appeared on television on a few occasions. Even though she only predicted a fraction of disasters and there were many that she could not foresee, her predictions were 100% accurate. Therefore, she received special treatment from the Hero Association itself, such as personal escorts. Shibabawa later died from a coughing fit that led to her choking on her cough drops after making a prediction about a God-level threat that would come in the next six months.
She is voiced by Kimiko Saitō in the Japanese version and by Barbara Goodson in the English dub.

Charanko

is the sole martial artist at Bang's dojo. He joined and trained in martial arts in order to become popular but did not amount to much and was given most of the menial tasks such as wiping the floors. He worked for a year until Bang's other disciples quit, making him the "number-one disciple". He tries to fight Garo but is defeated and hospitalized. He then gives his contestant ticket for the martial arts tournament to Saitama, who impersonates him.
He is voiced by Toshiki Masuda in the Japanese version and by Todd Haberkorn in the English dub.

Bomb

is Bang's older brother and a powerful martial arts master. His specialty is the. Bomb is first introduced during Garo's "hero hunt", when Bang came to his dojo in order to ask his big brother to help him stop his former disciple and Bomb accepted, finding Garo as a possible future threat for his own dojo as well.
He is voiced by Shinya Fukumatsu in the Japanese version and by Brook Chalmers in the English dub.

Sourface

is a rather large muscular man with a huge and hostile face which is a professional martial artist always dressed with a white gi. Sourface was once a disciple of Bang, but left after Garo rampaged through the dojo; sometime afterwards, he created the Sourface-style Kempo martial arts and started his own dojo. He meets Saitama at the martial arts tournament thinking that he is talking to Charanko.
He is voiced by Itaru Yamamoto in the Japanese version and by Armen Taylor in the English dub.

Suiryu

is a young man with tan skin and a low ponytail, he wears a traditional black uniform used in Chinese martial arts with star-like buttons. He had won four consecutive Super Fight tournaments before, as he is an incredibly powerful martial artist, utilizing the Void Fist style. He is very popular and has lot of female admirers, but does not want to be a hero, preferring to be a free spirit. He advances to the finals in the tournament that Saitama entered, but is unable to beat Saitama. However, he wins when Saitama is disqualified officially, yet still unsatisfied because of his recent encounter with Saitama. Shortly afterwards when the Monster Association converts many of martial artists with deeper darker sides into monsters, just as Suiryu's losing his strength and unable to fight the last of them, he cries for help and Saitama rescues him after which he vows to become a hero. When the news of Monster Association's HQ has been exposed to the surface at a location where Saitama life, just as the rest of the heroes who were injured from the previous battle rushes toward the battlefield and rescue civilians, Suiryu aware of his fellow pure-hearted surviving martial artists wanted to aid the heroes, but sadly their mental state still traumatized, advising them to train both physics and mentalities first as the means to be a real hero, After the fall of Monster Association, just as Hero Association is at a brick of critical situation by some heroes' current awful statuses, Suiryu was invited to a new organization called Neo Heroes, whereas his sister, Suiko join the Hero Association to honor their late-grandfather, Suicho.
In the anime, Suiryu is voiced by Masaya Matsukaze in the Japanese version and by Alan Lee in the English dub.

Tareo

Tareo is a kid with a guide/almanac to the Heroes. Garo befriends him.
He is voiced by Natsumi Fujiwara in the Japanese version and by Jeannie Tirado in the English dub.

Works cited