A group mainly composed of Hybrid Yōkai, half-breed monsters that take no definitive, physical form of anything classified as a supernatural creature (such as a Vampire or a Werewolf), who wish for nothing more than to destroy the current school system. They have an extreme hatred of pure-blooded yōkai, who they claim look down on half-breeds, forcing them to become subservient to their pure-blooded masters. In the localized manga, they are referred to as "Monstrels". Most members of ANTI-THESIS do not appear in the anime adaptation, as the anime focuses more on the aspect of the series. (In other words, the organization is manga-exclusive)

MembersEdit

• Hokuto Kaneshiro (Leader)
• Kiria Yoshii
• Midou Kusabi
• Mako Yakumaru
• Saizou Komiya
• Mizuki Ueshiba
• Moroha