A very nice and polite guy whose job is to slay demons. Everybody likes him because of his politeness. He has an evil twin also named Muzan and he is a demon. His brother wants the blue spider lily wich is a flower that is rare but his brother dosent know where it is. He is the only person who knows where the flower is located but he won't tell his brother since he's gonna take over the world with it. He wants to bring world peace. He is sensitive and his own twin makes him cry.