Groundsy

"you can come talk to ol‘ Groundsy anytime! But don‘t… come… to my hut. That‘s Groundsy‘s place. That‘s where Groundsy gets to be Groundsy, y'know what I mean? So please… please… that‘s Groundsy‘s time. Please don‘t come to Groundsy‘s hut."

Groundsy the Groundskeeper takes care of the grounds of Hieronymous Wiggenstaff's School for Heroism and Villainy. He has warned the students to stay away from his hut, which has windows painted black, several locks on the doors, and is surrounded by lawn ornaments.

Physical Description
He is described as "a large man with a big beard and big hair".

Trivia

 * He is not in charge of the grounds: he just keeps the grounds.
 * He's sketchy.