Belial (ベリアル Beriaru) is Mephisto Pheles' personal butler.
Belial is a thin man with slick black hair with a prominent curl on his forehead. He has a long pointed mustache and short beard with pointed ears. He wears the typical attire of a butler with a long black tailcoat, lightly coloured bow tie and pinstripe trousers.
Belial is an enigmatic entity working under Mephisto. Whether he is aligned with the Order or Gehenna is unknown.
True Cross Academy Festival arc
- "Belial" is one of the demon nobles listed in Ars Goetia, a section of the book The Lesser Key of Solomon.
- Before his official introduction, what appears to be a prototype version of Belial's character design is seen acting as Mephisto's Chauffeur.