Shirogane Karen

Introduced as a demon, Karen is actually a fallen angel who lost her halo, which Akane uses as a light bulb. Honest and gentle to a fault, her attempts to be demonic are often seen as angelic, though annoying. She was Genjirō and Tōko's classmate, and is the current student council president, having retained the position for over 20 years at the request of Akane. Her feathers can invoke one of the seven deadly sins in whomever gets stuck with them.