Student or Learner
“Not necessarily,” he said. “Hecate Hall and Graymalkin Island are completely Mrs. Casnoff’s domain. Your dad signs off on all the kids who’re sentenced here, but past that, he leaves it all to her.”
Way to be screwed over by delegating, Dad.
He delegates his authority over these kids, and then is held responsible for things that go wrong that "Mrs. Casnoff" does.