Master Beast enters the Underground Masquerade as a hulking werewolf brawler, all claws and muscle. His single documented bout, fought against the gourd-swinging Drunk Lee, doubles as the only real look readers of My Hero Academia: Vigilantes ever get at him.
Fur, bulk, and a lupine head define him, the build of a werewolf carried at fighting weight. Clothing is minimal: trousers, plus shoulder pads held in place by straps that cross his chest. The tournament's dress code adds a domino mask on top of all of it.
Almost nothing of his temperament reaches the page.

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A ring announcer names him and Drunk Lee, and the fight begins with Master Beast leading on his claws. The swipe misses, and he takes a gourd to the chin for his trouble. Once the drugs and uppers both men swallowed take hold, the pace climbs, and his second attempt lands, opening his opponent's chest with claws sharp enough to cut clean.
Drunk Lee answers by drinking and exhaling a flare through his Dragon Breath Quirk, which sets the werewolf's coat alight. The burns end the match. Master Beast is shown afterward recovering alongside the man who beat him.
His unnamed werewolf Quirk supplies the traits behind that showing, granting him a wolf's physical attributes: claws honed to a razor edge and strength above the human baseline.
Master Beast is a werewolf-like brawler who competes in the Underground Masquerade, an illegal fighting tournament featured in My Hero Academia: Vigilantes. His only documented fight is against a gourd-swinging opponent named Drunk Lee.
Master Beast has an unnamed werewolf quirk that gives him a wolf's physical traits, including claws honed to a razor edge and strength well above the human baseline.
Master Beast has a lupine head, fur, and a heavily muscled build. He wears minimal clothing consisting of trousers and shoulder pads held on by straps, plus a domino mask required by the tournament's dress code.
Master Beast's claws open a cut across Drunk Lee's chest, but Drunk Lee answers by exhaling a flare through his Dragon Breath quirk that sets Master Beast's fur on fire. The resulting burns end the match in Drunk Lee's favor.
After losing to Drunk Lee, Master Beast is shown recovering from his burns alongside the man who defeated him.
Looking for more on Master Beast? The My Hero Academia Wiki on Fandom has a dedicated page with community notes.
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