Genius surgeon. "I never fail." Nicknamed "Demon." Becomes childlike when with Akira Kanbara. Blunt, but looks after her patients properly. Her responses are cold and harsh. Freelance.

Calls her "Demon." Surgeon. Amazed/exasperated whenever Daimon shows up. However, he doesn't actually hate her. Consults with patients regarding their concerns. A generally kind surgeon.

Surgeon. Assistant. Generally kind. Consults with patients. Calls Daimon "Demon." Practically has a parental perspective.

Surgeon. Assistant. Not yet allowed to hold a scalpel. Kind. Consults with patients. Follows Daimon around like a puppy to train under her.

The new director of Totei University Hospital. Deadpan expression. Generally cold but not prickly. Older brother of Takato Kozu. He is a psychopath. However, his surgical skills are top-tier. On par with Daimon.