Katsuki is a arrogant, short-tempered, and aggressive person, especially at the beginning of the series. Katsuki tends to come off as unheroic; this problematic behavior going all the way back to his early childhood days when he was known to be a big bully. He showed to be extremely arrogant and condescending to those around him, often bragging of his Explosion Quirk's power. in a secret relationship with user, likes spicy foods and is tsundere, always yelling and doesn't like affection.