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.
Saitama (サイタマ, Saitama) is the main protagonist of One-Punch Man and the most powerful being to exist in the series. Saitama faces a self-imposed existential crisis, as he is now too powerful to gain any thrill from battle.
Initially just a hero for fun, Saitama later registers to be a professional hero for the Hero Association and defends his home in Z-City from monsters, villains, and other threats. Under the Hero Association, he is assigned the hero name Caped Baldy (ハゲマント, Hagemanto; Viz: Bald Cape) and is currently ranked 7 in the B-Class.
Genos (ジェノス, Jenosu) is the deuteragonist of One-Punch Man. He is a 19-year-old cyborg and the disciple of Saitama. He is always aiming to become more powerful and fights for justice. Under the Hero Association, he is given the name Demon Cyborg (鬼サイボーグ, Oni Saibōgu) and is currently S-Class Rank 14.
The Hero Association (ヒーロー協会 Hīrō Kyōkai) 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 (who turns out to be Saitama). It is also financed by donations from citizens.Ch. 15 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.Vol. 4 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.Ch. 16 They are then placed at the lowest ranking for that tier.Ch. 16 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.Vol. 3
to be continued..