Isuke Inukai is one of the main antagonists or one of the main protagonists in the manga and anime series Akuma no Riddle. She is a former student of Myojo Academy's 10th grade black class, and is competing with other students in her class to successfully kill Haru Ichinose, and the reward is that she can do whatever the assassin wants. Her compensation, she requested, was enough money for herself and her parents to build a house for them in the Caribbean or the Alps.