Bakuzan

In human form Bakuzan is a broad, muscular man with spiky dark hair, jagged sideburns, a heavy unibrow, and a goatee. He wears a white martial arts gi with the sleeves torn away. Once he swallows monster cells he swells far larger, standing nearly as tall as Gouketsu. His shirt disappears, leaving only white trousers, his eyes turn black with orange pupils, and his ears and teeth sharpen to points. Black fur spreads across his limbs and back, a second set of arms sprouts from his body, spikes jut from his shoulders and elbows, horns rise from his head, and three lemur-like tails trail behind him.

Enormously proud, Bakuzan wants everything he does to carry weight, and he is savage in the ring, treating martial arts as a place to gamble one's life rather than a sport. He sneers at fighters who approach the tournament as friendly competition and craves strong opponents, viewing a weak challenger as an insult to his ego. For all that pride, he is perceptive enough to recognize that Suiryu outclasses him and to grasp the gulf between humans and monsters, which stokes a bitter jealousy. Watching Gouketsu overwhelm Suiryu, he chooses to forfeit his humanity, greedily gulping down every remaining monster cell so that Suiryu cannot become a monster too. The change leaves him crueler and more sadistic, and he openly admits that his sole reason to grow strong was to prey on the weak. That very arrogance becomes his undoing, since he cannot accept that his blows mean nothing to Saitama.

Bakuzan claimed the Super Fight crown twice, winning in lopsided, bloody fashion thanks to his ferocious style. He returns for a third run at the C-City tournament and, when monster sightings prompt talk of evacuation, insists on staying to deal with any creature himself. His opening bout pits him against Saitama, who is disguised as Charanko. Infuriated by his opponent's refusal to take a stance, Bakuzan promises a gruesome beating, but when he brushes the wig and nearly exposes it, a panicked Saitama sends him crashing headfirst into the floor with a single blow.

He resurfaces at the closing ceremony as Gouketsu and the Three Crows offer the fighters monster cells. Acknowledging Suiryu's superiority, Bakuzan devours several cells at once and collapses, nearly dying before emerging transformed. Gouketsu swats him aside and warns him not to overrate his new power, but Bakuzan ignores the advice and sets about tormenting Suiryu, even threatening the unconscious Sneck to deepen Suiryu's despair. Saitama arrives in time to save them both. Recognizing the man who once floored him, Bakuzan hurls every technique of his Dark Hell Assassination Art at the hero, ending with the Hell Dispatch Chop, only for Saitama to blast away half his body and kill him.