Greenmen

The Greenmen are the janitors of the Yggdrasil Zone Academy of Arcane Pursuits, and are considered the academy's first line of defence.

Mages who have undergone specialist training

Their main job is to break up fights between students when one has clearly triumphed over the other.

Their secondary job is janitorial tasks.

They hold the same amount of authority as a King's Agent, who work closely with the Greenmen.

The Greenmen are not King's Agents, though.

Students fear them. They're like the queen's guard, but they're in your school.

They don't talk, they don't move. They just sit and watch, menacingly. They barely react to anything either.

They're huge, bulky, and have incredibly complex Gate patterns. Imagine the Travellers from God of War, but instead of huge swords, they're pretty much Magic negaters. They can break links by looking in the general direction of the person who's using them.