2nd year, Class 13 13 AB

Myouri Unzen is the leader of the Enforcers. He is a junior of Class 13 and a former member of the Flask Plan's Thirteen Party. His project name is Monster Child. He is the younger brother of Myouga Unzen. Unzen is the chief antagonist of the Clash With The Enforcers Arc, though he becomes more of a supporting deuteragonist later on in the series.

(Source: Medaka Box Wikia)