Saitama

Brown-eyed and famously bald, Saitama stands at an unremarkable height with a trim, quietly muscular frame that hides just how strong he is. The smooth scalp is the detail everyone notices, and it grew that way from his brutal workouts, which cost him the short black hair he once had. Artists render him two very different ways depending on the mood. Light or comic scenes flatten him into a rounded, egg-shaped head with sparse features and broad cartoon expressions, echoing the plain look of the original webcomic, while serious moments sharpen his jaw, deepen his stare, and carve out heavily defined muscle.

His hero outfit is a yellow one-piece suit zipped at the throat, cinched by a black belt bearing a round gold buckle at its middle, worn with red gloves that run partway up the forearms and red boots rising toward the knees, all topped by a white cape buttoned at the shoulders. Off duty he favors an assortment of shirts and hoodies printed with offbeat slogans and images, from his well-known Oppai hoodie to tees bearing everything from noodle soup to a mushroom.

On the surface Saitama reads as thoroughly ordinary, the kind of face no one remembers, and his own manner does little to change that impression. Because nothing can hurt him and no fight tests him, he has grown detached and listless, treating world-ending threats as chores and admitting that the feelings he once had in battle have gone numb. He typically lets an enemy boast and transform to their peak before flattening them with one strike, and away from combat he drifts through video games, manga, cheap meals, and naps. He is notoriously bad with names and faces, unbothered by insults unless they touch his baldness, and stingy with money yet oddly invested in a good sale.

He runs out of patience fast, cutting off anyone whose explanation drags past his preferred twenty words, and he flares up when his food, his apartment, or a video game loss is involved. Beneath the flat exterior he is sharper than he looks, reading people's motives and situations with ease despite bombing the written half of the entrance exam. What truly sets him apart is his decency. He is humble to a fault, repeatedly handing credit for his victories to weaker heroes who actually risked their lives, never turning his unstoppable strength toward selfish ends, and holding back to mere knockouts whenever he faces a human opponent.

For all that he can seem blunt and oblivious to others' feelings, Saitama genuinely looks out for the people around him, talking a suicidal man down from a ledge and pushing insecure heroes like Fubuki and Glasses to believe in themselves. Genos observes that Saitama draws powerful people to his side precisely because he cares nothing for rank or fame, and his quiet example nudges Genos, King, and others toward becoming better versions of themselves.

Saitama is the strongest being the story has shown, and to date nothing has managed to wound him while almost nothing survives a punch he throws in earnest. He credits his power to a plain routine, a hundred push-ups, a hundred sit-ups, and a hundred squats each day, along with a ten-kilometer run, kept up for around a year and a half, a regimen so severe he believes it both cost him his hair and, as Dr. Genus theorizes, broke the natural limiter that caps human potential. Genos suspects that even Saitama does not fully grasp how he became this way.

His strength defies ordinary limits. He has punched through a falling meteor, leaped off the Moon and returned to Earth within seconds, and canceled Boros's planet-threatening Collapsing Star Roaring Cannon with a single Serious Punch whose shockwave parted clouds across the whole globe. A stray sneeze during his duel with Garou blew away half of Jupiter's gases, and a careless flip of the ground shredded a moon. He is as fast as he is strong, blurring past speedsters like Speed-o'-Sound Sonic and Flashy Flash while leaving afterimages in his wake, and his growth has no visible ceiling, climbing to match any opponent who can briefly stand against him.

Nothing physical seems to reach him. He walks away unmarked from point-blank nuclear blasts, a gamma ray burst, lava baths, the vacuum and radiation of space, and Tatsumaki's telekinesis, which simply slid off his body. His toughness even extends to things without form, since he punched a hole into Phoenix Man's spiritual mindscape and swatted Garou's spatial portals aside with his bare hands. Much like Garou, he can watch a technique once and reproduce it, which is how he briefly learned to travel through time before the memory of it slipped away.

In practice he fights as a plain brawler, shrugging off martial arts theory in favor of blunt punches sorted into a lazy Normal Series and a heavier Killer Move: Serious Series. The latter holds his signature strikes, among them the Serious Punch, the wall-of-afterimages Serious Side Hops, and the ground-flipping Serious Table Flip. For all that overwhelming power, he stays oddly beatable outside of fighting, losing at video games to King, at rock-paper-scissors to Bang, and to Genos in a race to devour spicy noodles.