Isuke is one of the main characters of the manga and anime series Akuma no Riddle. She is a former student of the 10th year's Black Class of Myōjō Academy who was in a competition with the other students of that class who all were set to try successfully killing Haru Ichinose where the reward was anything the assassin wishes for. The reward she requested for was enough money for herself and her parents which would be used to build a house for her parents either in the Caribbean or the Alps.