Befitting his appearance, Muscular has a very sadistic and bloodthirsty personality. He openly admits that he wants to use his Quirk freely to kill. Muscular enjoys killing and tormenting those he fights, often saying "show me your blood!". Unlike most of the other members of the Vanguard Action Squad, he joined the League of Villains just to let loose his brutal tendencies, rather than following Stain's ideology
