A young doctor who lives with Celty and is also her lover. He mostly stays indoors and wears his white doctors coat even when he's not working. He went to the same primary school as Shizuo and Izaya, finds them interesting, but only up to a certain point. His father was also a doctor, and as a child, he participated in surgery alongside him, including an autopsy on Celty when they first met. As a doctor, he is interested in unique phenomena such as Shizuos unlimited strength during times of anger, Celtys healing abilities, headlessness, and bodily functions. He has the ability to sense what Celty is feeling, even though she doesn't have a head to show her emotions.