Blue Exorcist (青の祓魔師（エクソシスト） Ao no Ekusoshisuto) is a manga written and illustrated by Kazue Katō. The story revolves around Rin Okumura, a teenager who discovers he is the son of Satan born from a human woman and is the inheritor of Satan's powers. When Satan kills his guardian, Rin decides to become an exorcist in order to defeat his father.