Sal watched Pedro climb up the desks. "I'll stay here and keep wa-" A squeaking sound could be heard from outside the room. Sal looked at the door with panic as he quickly motioned for Pablo to hide further in the vent. The teen then ducked under the teacher's desk and strained his ears for the squeaking.
His heart stopped as he heard the jangle of keys. The door creeked open, revealing a adult female in a janitor's uniform. Blond hair and her hat covered her eyes, but someone could just about see a nasty scar tearing up her pale face. She walked with a slight limp and brought with her the source of the squeaking: a grey cart with the usual cleaning implements on it, a single whittling knife standing out among the appliances. Pablo would be able to see all of this in the safety of the vent's shadows while Sal was trying his best not to breathe or sweat or...
The Costodian looked at the stack of desks, then at the open window. She shook her head, "hell and back... Hell and back..." She muttered it over and over, first walking over to the window, closing and locking it. "Hell and back and they make me clean after stupid shitheads." She tipped over the tower of desks to let them fall with a explosive clatter, she seemed pleased with this. "Dumb bitch," she smirked before setting the desks back in their place.
The Costodian looked around the room, then spat on the floor. "I'll get back to you later." Then she took her cart and left, locking the door behind her. A long time passed. The squeaking faded away. "Is she gone," Sal wispered up to the vents.