The assigned SS agent to Banri, Natsume is a half-human, half-demon wearing a set of black rabbit ears on his head. He claims to be able to "see" things because of his demon heritage. He is a very cheerful individual. He is childhood friends with Sōshi and is very fond of him, calling him "Sou-tan" because of this. Natsume is somewhat an anemic and meddlesome busybody. His motto is "everyone should get along." But he has shown a more sinister side on occasion.