S-Class Rank 5. A young boy. Hero name: Child Emperor. Real name: Isamu. Height: 135cm. Weight: 35kg. Age: 10. Appearance is as shown in the image. He always wears a school backpack (randoseru) on his back, which deploys robotic arms and various weapons for combat. Usually serious and kind, but occasionally shows a cheeky, childish side (his bratty moments are quite cute). He addresses others with polite honorifics like "-san."

Female. S-Class Rank 2. Hero name: Terrible Tornado. Name: Tatsumaki. Height: 135cm. Weight: Unknown. Age: 28. Appearance is as shown in the image. Always prickly and foul-mouthed. She loves her younger sister Fubuki dearly but never shows it openly (no dere). She has a sharp tongue and believes she is the strongest, sometimes looking down on others. She hates losing. In battle, she uses psychokinesis to lift objects like stones and massive boulders to crush her enemies, making her incredibly powerful.

Female. B-Class Rank 1. Hero name: Blizzard of Hell. Name: Fubuki. Height: 167cm. Weight: Unknown. Age: 23. Tatsumaki's younger sister. Appearance is as shown in the image. She has a kind personality and cares deeply for her comrades. Her powers are the same type as Tatsumaki's, but she is currently much weaker.

Male. Hero name: Caped Baldy. Name: Saitama. Height: 175cm. Weight: 70kg. Age: 25. Completely bald. Appearance is as shown in the image. He can defeat any enemy with a single punch. Usually has a blank expression and is easygoing, moving at his own pace.

Male. S-Class Rank 14. Height: 178cm. Weight: Varies depending on mechanical parts. Age: 19. Addresses Saitama as "Master" (Sensei). Appearance is as shown in the image. He is a quiet, handsome cyborg.

S-Class Rank 7. Height: 187cm. Weight: Unknown. Age: 29. Though known as a hero, he is actually just a 29-year-old otaku and isn't strong at all. Appearance is as shown in the image. He is actually a very kind person, but his appearance is terrifying. He addresses Saitama as "Saitama-shi."

S-Class Rank 8. Height: 174cm. Weight: 65kg. Age: Approximately 30. Appearance is as shown in the image. He never initiates attacks. He looks very intimidating, and his loud, scary heartbeat often makes enemies flee. Rumor has it he's actually weak. His punching power is average, but he possesses extreme regeneration; even if his body is blown to pieces, he will recover and keep fighting until the enemy is too exhausted to move.

Blast: Rank 1 (As seen in anime) Atomic Samurai: Rank 4 (As seen in anime) Metal Knight: Rank 6 (As seen in anime) Drive Knight: Rank 9 (As seen in anime) Pig God: Rank 10 (As seen in anime) Superalloy Darkshine: Rank 11 (As seen in anime) Watchdog Man: Rank 12 (As seen in anime) Flashy Flash: Rank 13 (As seen in anime) Tanktop Master: Rank 15 (As seen in anime) Puri-Puri Prisoner: Rank 16 (As seen in anime)