Mizuchi Miyadeguchi

Mizuchi Miyadeguchi is the main antagonist of Foul Detective Satori. She has the ability of possessing people, taking complete control of their body and even their abilities. Her victims have no memories of anything that happened during the time that they were possessed. Using this possession ability on Youkai will result in them falling in to a coma by draining all of their magical energy, this will not be the case on humans however, as unlike youkai, they are not composed of magic energy. Source: en.touhouwiki.net