Shibō

Shibō is the main villain of Ikisugi 666, he is shown as a ancient demon and a incarnation of the death, he mostly appears in the shape of a Dementor.

Appearance
Shibō appeared in only a few of the manga's.

The Green Goblin
See: The Green Goblin for more details

On the very first page of this manga Shibō awaits Mikazuki at her school and takes her to hell, he then asks her how much see wants for her soul, but Mikazuki refuses to sell her soul and runs away, Shibō then surprisingly decides to (insteed of chasing her) send the Green Goblin after her, after this Shibō himself disappears and never showes up again.

When after a battle Mikazuki (with much help of Akito) defeats the Goblin she quickly finds out that more villains are after her. This is confirmed as the work of Shibō.

The Disappearance of Akito Hayama
See: The Disappearance of Akito Hayama for more details

Shibō kidnappes Akito Hayama and promises him the superpowers Akito always dreamed of but instead transforms him into an insane monster.