Crablante

Crablante was a hulking crab-like humanoid. Everything above the waist read as crustacean: a vivid red shell, hefty pincers, a broad mouth set beside two nostrils, and eyestalks jutting from either side of his head that ended in big oval eyes with tiny pupils. From the waist down he stayed a brawny, bare human male wearing only white briefs. In the manga a yellow tint colored his chest, echoing the shade seen on certain real crabs.

After the change, Crablante turned savage and bloodthirsty, cutting down bystanders as he hunted the boy who had defaced him. He prized what he called his beautiful body and grew furious the moment anyone marred or mocked it. Even so, he spared the gloomy, pre-training Saitama out of a flicker of pity, unwilling to hurt someone whose eyes looked as lifeless as his own. A verbal tic ran through his speech, which he tended to top and tail with noises like Blubblub and lol.

Three years ahead of the main story, Crablante ran into a young Saitama on a city street, and everyone but the jobless man scattered in panic. Asked why he wasn't fleeing, Saitama flatly said nothing mattered to him anymore. The monster laughed, and because Saitama's dead-eyed stare mirrored his own, he chose to let him live, explaining he was after someone else entirely. That someone was a ball-chinned boy who, while he slept in a park, had drawn a pair of nipples onto his skin in permanent ink. As Crablante closed in on the child, Saitama charged in to save him, and his buried dream of becoming a hero who topples villains in a single punch stirred back to life. The scuffle was brief but savage, ending when Saitama ripped out an eyestalk together with the monster's guts, gutting him.

Rated a Tiger-level threat, Crablante swung enough power to fracture pavement and split the ground with his pincers, and his Scissor Punch could shatter the earth outright, though those eyestalks tied to his organs served as a fatal weak spot. His attempt on the boy's life is what pushed Saitama into his grueling training, and the same incident handed Agoni the notion that became the Hero Association.