Rire is a young boy, he is 6 years old. Rire is half-human, half-demon and has black tentacles on the back of his back which he hides (he only shows the tentacles when he wants to hurt someone, which is rarely), Rire's enemy is Cain, Cain is half angel and half human, but Cain is rude and has 8 years. Rire has 2 best friends, One is Sano, Sano is half-human, half-snake and has a snake tail instead of legs, and Strade who is an ordinary human. Rire is always elegant and small gentleman.