A Yōkai is a demonic-like entity that was a former human that desired the power of demons for their own benefit. The Yōkais came into existence when a band of humans wanted to hunt down Onigen to devour her flesh and steal her powers. However, because they couldn't find and capture her, they turned their attention to hunting other demons to gain powers. Eventually, these humans succeeded in acquiring the power of demons, but at the cost of their humanity. With their lust for power was satisfied to the very least the band of humans joined together to seek a mutual goal, and were soon named the Yōkai Council.