Misogi Kumagawa (球磨川 禊, Kumagawa Misogi) is a senior of Class -13 and its first student. An executive member of Class -13, he is the center of the new Flask Plan, as well as the leader of the new Student Council created to oppose Medaka Kurokami. Kumagawa is the chief antagonist of the Kumagawa Incident Arc. After being defeated and reformed by Medaka, he joins her Student Council as its vice-president. Kumagawa is the protagonist of the Medaka Box sub-series, Good Loser Kumagawa Gaiden.