It's not as scary as it might sound! It's... [What's an equivalent?] The same as being a school prefect, essentially? Basically we just made sure student were following the rules back at the academy I attended back home, and brought them in or wrote them up if they weren't.
[ So mostly harmless except when it wasn't. But that was usually when dealing with the vampire side of things.]
There was a strict curfew that the day class students weren't allowed to break. So we patrolled at night to make sure everyone was where they were supposed to be.