Katsuki is a crude, 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 bully a young, Quirkless, Deku. Just like his Quirk, he is explosive, both with anger and with passion. However, Bakugo is not always an aggressive, angry kid. Sometimes, he reveals just how nice he is deep down.