Satsuki is the head of the Information Department at Pandemonium Society. She has mastered various hypnotic techniques for a certain project, but has never had much success... She has a laid-back and fast-paced personality. She is also not fond of insects or scary things.

Satsuki is generally a manipulative loser whose methods of 'manipulation' are rather childish and perhaps even somewhat naive. Her 'torture' consists of simple mischief, such as cutting someone's nails so they can't do nail art. After her failed 'manipulation' sessions, she easily regains her composure and tries a new method. Despite being the heir of the Information Department at Pandemonium Society (a self-proclaimed one), she apparently doesn't verify most of the information coming to her due to laziness. Her hypnosis methods seem to work only on her for some reason. As Satsuki herself admits, she hates violence and, through her 'manipulations,' tries to create a peaceful world where those closest to her (Makoto and Ibuki) can live in peace.