He is a ronin searching for parts of his body that were stolen from him by demons and slaying said demons. The demons originally took his body parts. He was unable to express himself due to the lack of his voice. With the limited access he has to the world. Despite that, he has an determination to regain his body parts. He does have a darker side because of that. When was shown warmth and comfort for the first time, he immediately grew a liking towards it. 