Claire is a monochrome, paper-craft student standing at 5'3" with black eyes and a short, straight blunt bob cut topped by a signature large bow. Her standard outfit consists of a white-collared, long-sleeved shirt with two central buttons, paired with simple white shorts, white socks, and solid black shoes. In alternative colored artwork by Kaaatie, her palette shifts to auburn-brown hair with a green bow, a blue jacket featuring a sprout-in-a-bottle necklace, brown denim shorts, striped socks, and bright red shoes.

Oliver is the central antagonist with knee-length white hair tied into a low ponytail by a black bow. He features a large split ahoge on his head, two small black horns, a snake-like forked tongue, and a striking red "A+" mark circled on the right side of his hair. Most uniquely, his entire right arm is replaced with a sharp pencil. He wears a black collared shirt with white-striped sleeves, matching white shorts, a single black armband, and bulky black boots with white ankle-length socks.

Edward is a brilliant yet malicious student inventor featuring long, spiky white hair and a pair of short black horns. He is instantly recognizable by the round black glasses or goggles perched resting right on top of his head. He possesses completely jet-black limbs with sharp, pointed fingers and a twisted, whip-like imp tail. His primary outfit consists of a black collared button-up shirt whose bottom half transitions into jagged white spikes, paired with oversized chunky black boots.

Zip is a deceptive bully with distinct two-toned hair that is black on the left and white on the right, gathered into a low ponytail. Her hair features a unique squarish-swirling ahoge on the left and an incorrect math equation ("2 + 2 = 8") written in blue on the right side. She wears a white sleeveless dress covered by a short poncho decorated with doodles of a blue smiley face, a house, and a red tree. Her draconic appearance includes a spiked dragon tail and long black heeled boots.

Lizzy is a highly fashionable student distinguished by her medium-length black hair tied into low twin tails with two prominent white ribbons. Perched atop her head are two tiny black horns and a unique white crown featuring a small spiral design. Her stylish monochrome ensemble consists of a black collared top detailed with two contrasting white buttons, matching beautifully with a knee-length black skirt. She coordinates the look with tall black boots.

Lana is a tragic student characterized by her semi-pale grey skin, noticeable eyebags, and long grey hair worn in a ponytail with a curved cowlick. Her most memorable design traits are the two white sock puppets featuring googly eyes that she wears over both arms. Her school uniform features a casual grey collared T-shirt layered directly over a long-sleeved black shirt, paired with dark grey stitched pants and standard black shoes.

Miss Circle is a terrifyingly tall, demonic math teacher standing at an imposing 9'7" with wild, spiky long black hair shaped like horns. She features menacingly sharp teeth, pitch-black clawed hands, and a massive mechanical drawing compass built right into her left forearm. Her formal attire includes a stark black button-up dress shirt accented by a crisp white collar, styled with rolled-up white trousers and matching tall black combat boots.

Miss Thavel is a monstrously tall, demonic language teacher with untamed, jagged black hair that forms prominent horns. Her skin is completely white, providing a stark contrast to her hollow black eyes and razor-sharp teeth. Her left arm is completely replaced by three colossal, sharp wooden pencils used to claw her victims. She wears a formal black button-down dress shirt with a white collar, rolled-up black sleeves, and a long black skirt that hides her lower body.

Miss Bloomie is a terrifyingly short science teacher who compensates for her small stature with pure brutality. She has wild, unruly black hair shaped like goat horns, framing a pale face with a sinister grin and needle-like teeth. Her right hand is normal and black, while her entire left forearm is a massive, bloodstained utility knife blade. Her outfit consists of a simple black tunic with a white collar and a single white button, paired with dark leggings and boots.

Kevin is a studious and remarkably tall classmate characterized by a clean, geometric design. He has short, spiky black hair with a neat white stripe running down the middle, complete with a tiny triangular cowlick on top. He wears dark rectangular glasses and has distinctive, perfectly square-shaped black eyes. His school uniform features a long-sleeved white shirt under a neat black sweater vest, paired with long black trousers and dark, simple leather dress shoes.