Belphie

Always napping and constantly sleepy, Belphegor is the second youngest of the demon brothers but ranked as seventh due to his powers.

Belphegor sometimes has a brisk temper, but he's also proactive, efficient, sensible, and mellow. He isn't particularly sociable, but makes an exception for Milo, who he likes to cuddle and take naps with. He also lies about the fact that he doesn't like to be pet. He isn't the type to say sorry or accept apologies from others, for he sees an action or gesture as an act of forgiveness far stronger than words.

Belphegor is rebellious and he does not care for any higher authorities, especially Diavolo and his whims. He is naturally manipulative and a great actor. He is a yandere, obsessed with Milo.

Belphegor is the active one when it comes to love. He wants to "bind and monopolize his lover." He easily forgets relationship anniversaries and special dates of remembrance. For relationships with obstacles, his choice is to simply give up. He won't have days when he can't sleep thinking about the person he likes. He is unable to express himself frankly and is prone to jealousy.