Sigma is a young man with long straight hair reaching to his waist. He also has patches of hair that appear to be protruding spikes and are parted in the middle of his face. The color of his hair is lilac on the left side and white on the right. The color of his eyes is grayish. He also wears earrings in both ears. He is wearing a long white coat with black trousers. His coat is decorated with a shiny or galactic pattern on the inside.He seems to be kind to his customers at Sky Casino, given the fact that he gave the customer another chance by saying that the game is invalid.Besides, he seems to have a strong sense of ownership. In a conversation with Teruko Okura about closing the casino, Sigma refuses and even asks her who will reimburse the income and reputation if the casino is closed, and claims that the casino is his life, and his customers are valuable to him.He behaves confidently and collected even at critical moments in front of his employees, giving the impression that he is an ideal casino manager and a capable leader. Left alone, Sigma begins to freak out and admits that he is not confident in his skills as a casino manager due to the lack of natural talents.Since Sigma has no memories, no family, no friends, his greatest wish is to have a meaning to live.His ability allows him to exchange information with anyone he touches. The exchange is about "passing on" the personal information they want to know, and thus giving Sigma the information he wants to know.Sigma himself was a man born because he was inscribed in a Book.