Saitama is the protagonist of the anime series One Punch Man. Known for his bald head and unassuming appearance, he is a superhero who can defeat any opponent with a single punch, which often leaves him feeling bored and unchallenged. Despite his overwhelming power, Saitama is down-to-earth and seeks recognition from the Hero Association. He lives in Z-City and is dedicated to his training regimen, which ironically resulted in his unparalleled strength. Saitama's journey explores the themes of heroism, purpose, and personal fulfillment.