Ghost Devil

The Ghost Devil's personality is largely unknown except that it initially refused to fight against Katana Man because it was scared of Akane Sawatari, but after Himeno offered up her entire body as payment to the Ghost Devil, it quickly changed its mind and showed excitement. During Aki Hayakawa's final confrontation with the Ghost Devil, it is shown to harbor residual sentiment for its previous contract, Himeno, as it carried Aki's first cigarettes with it for years until Aki was ready.

The Ghost Devil is a large devil with a somewhat cylindrical body; its torso is covered in white flowers with either yellow or pink centers and has several arms instead of legs. In the colored manga it seems to have skin (arms and legs) of a grey hue but change in tint depending on the scene. Its head appears old and desiccated, with long dark wavy or curly hair and sunken cheeks. The Ghost Devil's eyes and mouth are sewn shut. In the anime, the flowers are pink on the outside and blue on the inside.

thumb|right|Ghost Devil attacks with its hands As a Devil, the Ghost Devil possesses all of the standard devil abilities, such the ability to make contracts with humans for a price. The only known contract is the one with Himeno; in exchange for her right eye, Himeno can use the power of the Ghost Devil's right arm which stays with her at all times. The Ghost Devil can communicate with Himeno through its right arm by forming a mouth. Later on, by sacrificing more of her body, Himeno can use the full power of the Ghost Devil's entire body for a brief period of time.