One Punch Man Filler List

A 25-year-old former salaryman who became a superhero as a hobby. Three years of insane training left him absolutely bald and absolutely unbeatable. His deadpan reaction to invincibility — boredom — is the series' core joke and its genuine emotional tragedy.

A teenage cyborg rebuilt for revenge against the villain who destroyed his hometown. Deadly serious about everything, Genos registers as an S-Class hero while Saitama languishes in C-Class. His absolute belief in Saitama's greatness is both touching and hilarious.

A professional ninja who develops a rivalry with Saitama after losing to him in a humiliating misunderstanding. His obsession with defeating Saitama is consistent and consistently ignored by Saitama.

A C-Class cyclist hero with no special powers who faces the Sea King regardless — simply because someone has to. His speech before the fight and his utter defeat by an opponent he cannot possibly beat is one of the series' most genuinely moving sequences.

An alien conqueror who traveled the cosmos seeking a worthy opponent and found Saitama. Finally, someone who requires more than one punch. The tragedy of their fight — that even Boros isn't truly a challenge — is the series' emotional peak.