Hall Monitors

The hall monitors are creatures of the pale flesh. They emit a song that erases their appearance from and implants strong subliminal messaging into the minds of any who can hear it. They are controlled magically from a crystal ball in the headmaster's tower. They act as eyes and ears for the headmaster, allowing him to monitor and control students activities throughout the school.

With the School turned into a Casino Prison for The Navy, Don Bomble began using them to keep people there and partying.