Oliver is a male university student with ankle-length white hair tied into a low ponytail with a black bow. He has black horns, a large split ahoge, a red circled “A+” mark on the right side of his hair, and a forked tongue. He wears a black collared shirt with white stripes on the sleeves and hems, white shorts, white knee-high socks, and black boots, with a rhombus-and-slash symbol on his shirt. Oliver is snarky, playful, arrogant, and known for bullying and teasing other students. He enjoys drawing and appears confident in his own appearance. He is also extremely attached to ∆lice, his childhood friend and girlfriend, despite her cruel personality.

∆lice is a mysterious and extremely dangerous young woman who lives separately from the other students. She has long, messy white hair, black horns, sharp teeth, and a distinctive dark outfit. ∆lice is cruel, violent, and intimidating, with an extremely threatening presence that causes nearly everyone around her to fear her, including the teachers. She is closely associated with Oliver, who is her childhood friend and boyfriend. Unlike most people, Oliver and Kevin are notably unafraid of her. She is also highly aggressive when someone enters her room and will pursue those who escape from it.

Engel is a male student with long, messy white hair tied into a low ponytail, decorated with blue and reddish-orange feathers. He wears a white collared shirt with blue and red stripes on the left sleeve, black overalls, blue-and-red striped leg warmers, and black shoes with small heels. His arms are black and have four pointed fingers, and he has a small white tail. Engel is kind, caring, and protective of those close to him. He is especially devoted to Claire and is willing to put himself in danger to protect her. He is friendly with Bubble and is generally a good student.

Claire is a hardworking student with a simple blunt bob haircut and a bow on top of her head. She wears a white collared long-sleeved shirt with two buttons, along with a skirt and shoes. Claire is generally calm and focused on her studies, though she can become annoyed by the antics of other students. Despite being hardworking, she can be anxious, especially when placed in unfamiliar or dangerous situations. She is thoughtful and capable of making quick decisions when desperate to escape danger. Claire is friends with Engel and is also part of the same group of students as Bubble, Lana, and Abbie. She frequently found herself targeted by the school's bullies.

Edward is a male student with long, spiky white hair and a pair of short black horns. He wears round black glasses, which are usually positioned on top of his head. His arms and legs are black with pointed fingers, and he has a twisted black imp-like tail. He wears a black collared shirt with buttons, with the lower portion of his shirt being white, along with large black boots. Edward is one of the three main bullies alongside Oliver and Zip. He is playful, mischievous, and enjoys teasing other students. He is also creative and innovative, showing an apparent interest in science and inventing things.

Zip is a female student with two-toned hair, with the left side black and the right side white. The longer portion of her hair is tied into a low ponytail, while the right side has a blue incorrect equation reading "2 + 2 = 8." She also has a swirly, squarish ahoge on the left side of her hair. She wears a white sleeveless dress with a white short poncho covered in simple drawings, including a blue smiley face, a blue house, and a red tree. She has a spiked dragon-like tail and wears long black boots with heels. Zip is playful, mischievous, and enjoys causing trouble with Oliver and Edward. She is a bully who frequently picks on other students, particularly Claire, and has a misleading side that allows her to trick others. Despite this, she can be playful and affectionate toward people close to her, including her younger brother Chip.

Emily has long, flowing golden-blonde hair with pointed, layered ends, a large upward-curving strand on top, and a small white flower accessory on one side. She wears a delicate white tiara with a pink bow-like decoration beside it. Her outfit is a bright pink dress with a white collar, puffed sleeves, white cuffs, a white belt with a pink heart buckle, and a heart-shaped necklace. The skirt has white scalloped trim with tiny heart details. She wears white stockings and pink shoes. She is annoying, mainly targets boys for attention, and heavily relies on makeup and styling for confidence. Oh, and she absolutely HATES The Girls.

Bubble is a quiet, kind, and empathetic student with fluffy white hair that reaches her shoulders and resembles bubbles or clouds. She has no visible head or conventional facial features, with only her blue eyes visible; her eyes have black upper portions and distinctive white, star-shaped pupils. A pale-yellow rubber duck and blue toothbrush rest on top of her fluffy hair. She wears a white short-sleeved shirt underneath a black overall dress with a large front pocket, a black wristband on her left wrist, white socks, and black shoes. She also has a large, fluffy white tail.