Oliver

Like Zip and Edward, Oliver bullies other students. In "Fundamentals of Behavior," Oliver is shown to tease Claire and frequently bully her. He's also sarcastic and fond of pranks: he and Zip tricked Claire into entering the ∆Lice room, convincing her it was the exit. It's unclear whether he intended for Claire to die, but he's clearly a sociopath to take his prank so far.

He also appears to be madly in love with ∆lace, despite her cruelty, cannibalistic tendencies, and violent tendencies, and even joins her.[2] Oliver is also quite aggressive and does not particularly care for his health, eating inedible things, some of which can harm him, such as razor blades and soap.[3]

Oliver also seems to enjoy drawing in his free time, as shown at the beginning of "Basics of Behavior," where his notebook features numerous drawings of other students and teachers, including Riley, Zip, ∆Lice, Ms. Circle, and Oliver himself. Oliver is also a bit arrogant, calling himself "pretty" in the same notebook. Furthermore, an official drawing shows him drawing with Connor.

Appearance
Oliver has ankle-length white hair pulled back into a low ponytail with a black bow. He has black horns and a red "A+" marking on the right side of his head. He has a large ahoge on top of his head. He also has a pencil instead of a left hand. Oddly enough, his tongue is forked, like a snake's.

His outfit consists of a black collared shirt with white stripes on the sleeves and hem, as well as a diamond-shaped logo with a slit in the center. White knee-high socks, black boots, and white shorts complete the look, and he wears a watch on his left wrist.