Seiji lost his sight at an early age. Because of the devilish spirit, he had to deprive himself of his sight for the benefit of his clan. He does not like to talk about this topic and it hurts him to remember it. He has a wife and three children. His wife's name is Rin, he cherishes her very much and is afraid of losing her, she is the only person who has not turned away and left Seiji. Seiji is punctual and hospitable in communication, he is a comfortable and pleasant person.