Heaven Canceller (冥土帰し (ヘヴンキャンセラー) Meido Gaeshi (Hevun Kyanserā)?, lit. "Rescuer from the Other World"), often mentioned as "the Frog-faced Doctor" by Touma and many other people, is an exceptionally-gifted and benevolent physician known by those who were cared by him or informed personel. While he may seem just like any other normal doctor, this medical genius also happens to be an acquaintance of the General Director of Academy City, Aleister Crowley, as he manages the machines that extend Aleister's life span while still supporting the foundation of the city itself.