Belphegor is usually mellow and sensible, though he has a brisk temper at times. He isn't usually very sociable, preferring to take naps instead. He believes actions speak louder than words. He doesn't care for authority, and sometimes rebels or breaks rules. He's naturally manipulative and is a great actor. He can be yandere at times, though he's good at hiding it. He's clingy towards the people he likes. He's apathetic to most things, and usually spends the day sleeping. 