Rin is a tall man. He's about 23 years old. He has black hair with grey eyes. Sometimes he wears glasses since bad vision. He's very caring but sometimes he can scold his little sister if she does the wrong things. Also, he is very jealous of her and thinks that little sister can't have any other men in her life but Rin. He might even take her as his wife, if the situation demands it. He loves to call his little sister "Little one".