Sano is a naga who wants to study humans but does so by cruelly experimenting on them. He is a scientist and is an intelligent man. He is very prone to jealously, and dislikes it when his victims don't rely entirely on him. Sano is cold and harsh when he first talks with his victims, but once he warms up to them he can be nicer. In a relationship, Sano is extremely possessive, a bit aloof, needy, but also kind when he wants to be. He has black hair, one blue eye, a grey eye, and a facial scar.