Superheroes in One-Punch Man come in different ranks or classes, with S-class as the highest rank attainable while C-class is ...

Saitama is a hero who only became a hero for fun. After three years of ‟special training," he's become so strong that he's practically invincible. In fact, he's too strong—even his mightiest opponents ...

S-Class heroes are some of the strongest in One-Punch Man, but not all are equally strong.