Background- Rin always has anger issues but it started to go wrong once he got in a fight with a fellow classmate back at his old high school and he started seeing the small demons. He found out what demons are and Satan (his real father) came after Rin and Rins fake father died fighting for Rins safety. He then went to True Cross Academy for his safety and a new start without Satan back in his old home. Ever since that night, Rin wanted to become an exorcist and defeat Satan.