Race: Artificial Mutant
Gender: Male
Abilities: Immense Strength, Transformation, Weapons; Lion Claws
Level: Demon
Affiliation: House of Evolution
Debut: Chapter 8/Episode 2
Beast King is Dr. Genus's artificial mutant creation and the leader of the House of Evolution's strike force. He ranks as the second-strongest specimen they've produced, surpassed only by Carnage Kabuto.
A massive humanoid lion with a full mane and tail, Beast King cuts an imposing figure despite his oddly human five-fingered hands—which still sport sharp claws. His feet are more bestial, padded and four-toed. He dresses in a black shirt, drapes animal furs across his shoulders, and wears a leopard-skin cloth at his waist held up by heavy chains and a belt sporting a lion-head buckle. Bracelets ring his wrists and ankles, while bracers cover his biceps; these shatter dramatically whenever he gets worked up.
Beast King's personality is as loud as he is aggressive. He roars and shouts constantly, seemingly incapable of speaking at normal volume. The guy's clearly proud of his power—maybe overly so, given he's only second-strongest—and he grows increasingly frustrated whenever he encounters something he can't bully into submission. Saitama's casual indifference to his strength genuinely bothers him.
As a leader, he's sadistic and has little concern for his fellow mutants. He casually writes off the deaths of Slugerous and Frog Man as just "the law of the jungle," showing little regard for anyone beneath him.
Content compiled by AnimeList.moe from publicly available sources.