Prefects are a rank in the Crew of the Copper-Colored Cupids.
The title of Prefect is held by the leader of one of the Departments of the Cupid Intelligence Institute. In addition to making the Prefect ostensibly the head of their Department, it also gives them the right to sit in the Cupid Parliament.
Behind the scenes
The title of "Prefect" in a Cupids context was first mentioned in Lord Thymon and the Department of Problem-Solving.