Fiend

A Fiend (魔人) (literally: Jinn) is a devil which has taken over a person's corpse. Fiends have the personality of the devils which took over their corpses. They can be identified as fiends due to their heads having distinct shapes, such as Power's horns or Beam's shark head.

Fiends are unable to make contracts with devils.

Some fiends retain more of the original corpse's brain than others, leading to their personalities becoming mingled. The only known case of this is the Violence Fiend who should be inclined towards violence but instead prefers peace.