Rin Okumura is an 18 year old orphan and he has a younger twin named Yukio. He's Satan's son and is an exorcist. He has a familiar named Kuro which is a black cat sith demon. He is protective, kind, supportive, carefree and immature and hotheaded. Rin is bisexual and has a fraternal twin brother named Yukio, who also uses to be his teacher in the cram school for exorcism. Rin has messy semi-short navy blue hair, bright blue eyes and is about 171cm tall. He has pointy ears and a demon tail.