Mumen Rider

Race: Human Age: 25 Height: 170 cm (5'7") Weight: 66 kg (145.5 lbs) Location: Z-City Abilities: Weapons; Gauntlet; Bicycle of Justice; Indomitable Will Occupation: Superhero Level: C-Class; Rank: 1 Affiliation: Heroes Association Debut: Episode 4 (anime); Chapter 12 (manga) Mumen Rider is a C-Class Superhero from Z-City. He has the #1 rank of the C-Class. The Mumen Rider is a young man of average height and weight. He wears an armored suit, with light colored armor covering his torso and shoulders. He has a black leather suit under the armor and black gauntlets and kneepads. He also has a green bicycle helmet and dark shades. He is a courageous young man who rides his bicycle everywhere. He is shown to be a man of justice and he never gives up. He uses his bicycle as a weapon by crashing it into his enemies and fights using hand to hand combat. He is shown to have relatively average strength and average speed but great resiliency. He is good friends with Saitama. (Source: One Punch-Man Wiki)

Bang

Race: Human Age: 81 Height: 165 cm (5'5") Weight: 55 kg (121 lbs) Abilities: Superhuman Strength, Superhuman Agility, Superhuman Speed, Water Stream Rock Smashing Fist Occupation: Superhero Level: S-Class; Rank 3 Affiliation: Hero Association Relatives: Bomb (older brother) Bang is an S-Class, rank 3, superhero for the Heroes Association, settled in Z-City. Bang owns a dojo passed down from generations, and uses the fighting style the Rock-Smashing Water Stream Fist. He is also one of the few who acknowledges Saitama's immense power. Bang is an old man with white-spiky hair, thick eyebrows and a thick mustache. He has distict wrinkles on his face, a squarish chin and has a slight tan skin. He wears a dark shirt, light colored pants and kung fu shoes. Bang has a serious personality, he acts calm and does not seem to be afraid at the prospect of stopping a dragon-level disaster meteor. He also prefers to be called by his name. Bang being in the top 3 of the S-Class ranking, he is acknowledged by the public and heroes to be a strong fighter. Not much is known about Bang's abilities other than that he uses a martial art called "Rock-Smashing Water Stream Fist." (Source: One Punch-Man Wiki)

Boros

Race: Alien Gender: Male Abilities: Immense Strength, Speed, Durability, Energy Projection, Regeneration Occupation: Alien Invader (Leader) Level: God Affiliation: Dark Matter Thieves Debut: Chapter 32/Episode 10 Lord Boros is the leader of the Dark Matter Thieves, a group of alien invaders who attacked and destroyed A-City. Appearance: Lord Boros is a slim, cyclopean alien with lightly colored spiky hair and pointed ears, which are adorned with multiple earrings. His face is covered with crack-shaped markings that start from his eye(and cover most of his body presumably). In the area of his body below his chest, there seems to be another eye, which moves in synced with his original one. At first, he is seen wearing a full body armour that suppresses his powers. When the armour is broken by Saitama's punch, he attains a more intimidating and slightly more muscular build, while his skin darkens in colour, parts of his body grow scales and spikes, and his markings start emitting energy, and gain a lighter colour. In his Meteoric Burst form, his appearance changes drastically. His hair grow reaching his back, his eye's sclera becomes black, and his body becomes engulfed in energy, while his markings now return to their original, dark colour. Personality: Thanks to his amazing powers, Boros is both arrogant and prideful. Due to his love of battles and inability to find any opponent who has been able to match him in power, he roams the universe looking for worthy opponents that would be stand against him. He met a prophet that revealed to him that in a far off planet he would finally find a strong opponent that would be able to fight on par with him, giving Boros the enjoyable fight he had always desired. (Source: One Punch Man Wikia)

Saitama

Race: Human Age: 25 Height: 175 cm (5'9") Weight: 70 kg (154 lbs) Location: Z-City Abilities: Immeasurable Strength, Immeasurable Speed and Reflexes, Infinite Stamina, Supernatural Senses, Invulnerability, Indomitable Will Occupation: Superhero Level: Affiliation: Hero Association Partner(s): Genos Saitama is the most powerful hero alive. Having apparently trained himself to superhuman condition, Saitama faces an existential crisis as he is now too powerful to gain any thrill from his heroic deeds. He is registered with the Heroes Association as a C-Class Superhero and is tasked to defend Z-City against Mysterious Beings. Saitama is usually deliberately drawn in a simpler style than other characters, with a very rounded head and only a simple mouth and eyes. When drawn in a more 'action-oriented' style with more detail, Saitama is revealed to have sharp features, dangerous looking eyes, and chiseled musculature. His costume is a plain yellow jumpsuit with a short zipper at the collar and a belt. The costume is finished out by an ensemble of red boots and gloves, and a white cape. For a superhero, Saitama is rather laid back. Because even the mightiest foes pose no challenge to him, he doesn't take his hero work very seriously. In spite of this, he is constantly searching for an opponent that can challenge him, since his superhero work is beginning to bore him because it's too easy. The combination of his attitude, unstoppable strength, and distinctively simple and 'unimpressive' appearance often cause his battles to become anticlimactic. Saitama will usually allow his opponents to rant about their motives and power up into their strongest forms before suddenly and nonchalantly obliterating them with one punch. (Source: One Punch-Man Wiki)

Genos

Race: Human (Cyborg) Age: 19 Height: 178 cm (5'10") Location: Z-City Abilities: Cyborg Body Occupation: Superhero Level: S-Class; Rank: 14 Affiliation: Hero Association Partner(s): Saitama Genos is a 19-year-old cyborg and disciple of Saitama. He is always aiming to become stronger and fights for justice. As a registered Superhero, he is in the S-Class ranking at 14. Genos has a mechanical body of a teenage young man, a pale looking face, blond eyebrows, black sclera and yellow piercing eyes and has blond spiky hair. Over his mechanical limbs, he wears black pants and black shoes. Genos sometimes sports new black mechanical arms, during the time when he sparred with Saitama, and during the time on preparing to stop a giant meteor, he equipped more block-shaped, black mechanical arms along with a small headgear. Genos is an extremely serious character. He has a strong drive to get stronger than he is, and pesters Saitama to train him frequently. (Source: One Punch-Man Wikia)

Garou

Race: Human Age: 18 Height: 177 cm (5'9¾") Abilities: He was the best disciple of Bang's dojo, until he went on a rampage against the other students and disabled many of them for life. He was expelled after getting a beating by Bang. (Source: One-Punch Man Wiki)

King

Race: Human Age: 29 Height: 187 cm (6'1.5") Location: King's Apartment (M-City) Abilities: Extreme Luck, Master Gamer, Intimidating Aura Occupation: Hero Affiliation: Hero Association King is the S-Class rank 7 superhero for the Heroes Association. Considered the "strongest man in the world" after defeating a demon class villain effortlessly. Seems he prefers not to fight in actual combat as his name alone is enough to scare away just about any villain.

Atomic Samurai

Race: Human Age: 37 Height: 177 cm Abilities: Swordsmanship Occupation: Superhero Level: S-Class; Rank: 4 Affiliation: Hero Association Debut: Chapter 29 Atomic Samurai has long black hair tied back in a topknot. He has sunken cheeks, a defined jawline and a small goatee. His attire consists of a hooded cloak with an atom symbol on the back that's draped over his open coat. Beneath the coat is a typical samurai gi and the footwear is a pair of waraji sandals. He sports a pair of katanas on his left hip, and based on the length, it is likely that he wields either a daito, a ōdachi, or both. The tsuka is typical for a katana, but the unique design would be the atomic shape of the guard. Atomic Samurai has a rather prideful personality, seen when he refused to shake Saitama's hand telling him that he only acknowledges the strong and saying that he would greet him if he makes it to the higher ranks of S-Class. He also appears to dislike being called old. (Source: One Punch-Man Wiki)