A-Row: Armored Gorilla / Ashura Kabuto / Atomic Samurai / Iaian / Handsomely Masked Amai Mask / Webigaza / Evil Natural Water / Okamaitachi / Demon Cyborg (Genos) / Speed-o'-Sound Sonic K-Row: Monster King Orochi / Frog Man / Crablante / Kamakyuri / Garou / Ganriki / Gearspur / Captain Mizuki / Gyofree / Gyoro-Gyoro / Kirisaking / King / Metal Bat / Dr. Kuseno / Drive Knight / Grand Dragon / Black Sperm / Geryuganshoop / Hellfire Flame / Gouketsu / Ancient King / Kombu Infinity S-Row: Psykos / Saitama (Caped Baldy) / Lily of the Three-Section Staff / Dr. Genus / Genos (Demon Cyborg) / Hellish Blizzard / Gale Wind / Shadow Ring / Beast King / Silver Fang / Deep Sea King / Suiko / Suiryu / Stinger / Sneck / Smile Man / Flashy Flash / Terrible Tornado / Overgrown Rover / Zombieman T-Row: Daishokkan / Tanktop Girl / Tanktop Master / Charanko / Superalloy Darkshine / Choze / Child Emperor / Monster Princess Do-S / Venomous Lizard Sisters N-Row: Sludge Jellyfish / Needle Star / Nyan H-Row: Gums / Bakuzan / Caped Baldy (Saitama) / Spring Mustachio / Watchdog Man / Phoenix Man / Fuhrer Ugly / Pig God / Blast / Free Hugger / Puri-Puri Prisoner / Blue Fire / Homeless Emperor / Bofoi (Metal Knight) / Boros / Bomb M-Row: Maiko Plasma / Manako / Martial Gorilla / Centichoro / Centisennin / Mumen Rider / Glasses / Megami Glasses / Metal Knight (Bofoi) / Mosquito Girl Y-Row: Yamazaru / Yuta R-Row: Lightning Genji / LOVIT_RABBIT / Rin Rin W-Row: Vaccine Man / Ippatsuya Saitama The protagonist of this work. After three years of intense training and monster hunting, he pushed himself so hard that all his hair fell out, but in exchange, he gained invincible strength. Synopsis Genos, a cyborg youth pursuing the enemy who burned his hometown, appears. When Saitama defeats a monster that had driven Genos to the brink of self-destruction with a single blow as usual, Genos witnesses his overwhelming power and begs to become his disciple. From that day on, Saitama joins the Hero Association, which establishes heroes as a profession. He meets and interacts with various people, including heroes belonging to the association, ninjas, martial artists, psychics, and shut-in otaku.