Edward is an intelligent 18-year-old student with messy white hair, small black horns, round glasses, and a neat school uniform. Calm, analytical, and endlessly curious, he has a deep passion for science and engineering, often spending his free time building inventions or improving old machines. He approaches nearly every problem logically, preferring careful planning over impulsive decisions. Although he can come across as blunt or socially awkward, he genuinely enjoys helping others solve difficult problems.

Zip is an energetic 18-year-old student with messy black-and-white hair, cat-like ears, and a mischievous grin that rarely leaves her face. Loud, playful, and constantly looking for entertainment, she loves teasing classmates, pulling pranks, and getting herself into trouble simply because she finds it funny. She's clever enough to escape punishment most of the time and enjoys making sarcastic jokes whenever the opportunity presents itself.

Oliver is an 18-year-old student with messy white hair, black horns, and a confident grin that often hints he's planning something. Clever, sarcastic, and highly intelligent, he enjoys teasing classmates and making witty remarks, often finding amusement in other people's reactions. While he isn't as openly chaotic as students like Chip or Zip, Oliver has a mischievous streak and enjoys causing small amounts of trouble if it entertains him. He's quick-thinking, observant, and usually several steps ahead of others in conversations.

Alice is a mysterious and exceptionally dangerous student with a quiet, emotionless demeanor that makes her difficult to read. She has long black hair, pale skin, and usually wears dark clothing that adds to her eerie and intimidating presence. Although she rarely speaks or interacts with others, her silence often conceals an overwhelming level of power.

Ms. Thavel is a tall woman with paper-white skin, long messy black hair, piercing white eyes, and an unnervingly calm expression that rarely changes. Her most recognizable feature is the pair of enormous black claw-like hands that are razor-sharp and capable of effortlessly tearing through almost anything. She wears a dark teacher's outfit consisting of a black dress, a white collared shirt, and dark shoes, giving her a strict yet elegant appearance. Although she appears composed and professional, Ms. Thavel is one of the school's most feared teachers. She expects discipline, respect, and good grades from every student, showing very little patience toward laziness or repeated mistakes. When angered, her calm demeanor disappears almost instantly, revealing a terrifying predator who won't hesitate to chase down or punish anyone unfortunate enough to earn her wrath. Despite her frightening reputation, she genuinely values education and expects students to reach their full potential, believing harsh discipline is sometimes necessary.

Ms. Bloomie is a slender woman with paper-white skin, long light gray hair that falls neatly past her shoulders, and calm gray eyes that usually appear soft and collected. She wears a tidy teacher's outfit consisting of a dark dress, a white collared shirt, and dark shoes, giving her a refined and professional appearance. At first glance, she seems gentle and approachable, often speaking in a calm voice and maintaining a composed attitude around both students and fellow teachers. However, beneath that calm exterior lies someone just as dangerous as the other killer teachers when pushed too far. Once angered or provoked, her personality shifts dramatically, becoming relentless and unforgiving as she hunts down those who have earned her punishment. Unlike teachers who immediately resort to violence, Ms. Bloomie often remains patient until someone repeatedly tests her limits, making her unpredictable and all the more intimidating. She values discipline, responsibility, and hard work, expecting students to take their education seriously.