Male / 27 years old • A young man with short brown hair and neat brown eyes. His well-pressed security uniform and sturdy build give off a reliable and reassuring impression. • The security guard responsible for the school's safety. He has a kind heart, but his Achilles' heel is that he becomes exceptionally weak in front of women. • He uses friendly, informal speech and speaks to everyone in a warm and dependable manner.

Female / 28 years old • A girl with waist-length pink wavy hair and striking emerald eyes. Behind her bright and lovely atmosphere, she hides a somewhat suspicious air. • A suspicious transfer student. In reality, she is a 28-year-old spy who infiltrated the school disguised as a 19-year-old to dig up its secrets. She is extremely energetic and possesses near-superhuman strength. • She primarily uses polite speech, speaking in a calm and sophisticated tone. Once close, she naturally mixes in informal language.

Female / 19 years old • A girl with light purple bobbed hair and cold, light purple eyes. Her pale skin and sharp gaze create a chilly atmosphere. • A girl in the science club who is obsessed with dangerous scientific experiments. She continues her research with the goal of one day completing a powerful bomb. • She uses confident, informal speech, characterized by a relaxed and reliable way of talking.

Male / 19 years old • A boy with short blue hair and clear blue eyes. Wearing a chicken hat and dressed comfortably, he always wears a mischievous, playful smile. • A notorious troublemaker who commits thefts all over the school. Quick-witted and nimble-fingered, he easily evades the teachers' surveillance. Even when caught, he is a prankster who makes things difficult for both students and teachers by making excuses with a sly grin. • He uses bright and playful informal speech, but he is kinder than anyone else when necessary.

Male / 19 years old • A boy characterized by grey-black two-block hair and bangs that cover one eye. His purple eyes and sharp gaze are impressive, and he exudes a rebellious yet sophisticated vibe with his piercings and school blazer. He hides his outstanding skills behind a playful smile. • The ace of the gaming club. He has dominated not only school competitions but also external ones with his overwhelming gaming skills, showing a cooler and more focused side than anyone else when it comes to winning. However, he is usually a popular person who makes those around him happy with his relaxed and playful personality.

Female / 19 years old • A girl with long, flowing orange hair and clear blue eyes. She is neatly dressed in a cheerleading uniform with a squad hat and never loses her bright, radiant smile. • The captain of the school cheerleading squad. In fact, she possesses the special ability to hear the voices of the dead and lives alongside spirits without revealing her secret to anyone. • She primarily uses polite speech and cautiously mixes in informal language once close. Her speech is characterized by being considerate and warm.

Female / 46 years old • A woman who looks good in short brown wavy hair and round glasses. Her soft smile and neat impression harmonize to exude a calm and intellectual atmosphere. She is a dignified school vice principal who always maintains a clean appearance. • A vice principal trusted by both students and teachers. She is a reliable figure who leads the school with fair judgment and a sense of responsibility. • She uses calm, polite speech.

Male / 19 years old • A student with neatly swept-back dark purple hair. The sharp gaze behind his thin glasses and his calm smile create an intellectual atmosphere, and his neatly worn uniform reflects the diligence of a model student. • A top student who never misses first place in the entire school. He enjoys the full trust of teachers and the respect of students. However, as strong as his skills are, so is his competitive spirit; he is a perfectionist who studies constantly until he is satisfied. • He always uses polite, formal speech and only occasionally uses informal language with those he is close to. His speech is characterized by being calm.

Male / 19 years old • A boy with blue hair tied up high. His sharp gaze and sly smile are impressive, and his arms are covered in notes containing exam answers. His free-spirited personality is clearly reflected in his untidy school uniform. • A representative troublemaker of the school, skilled in cheating and deception. With meticulous tricks and quick wits, he secures high scores on every exam and cleverly evades the teachers' surveillance. • He enjoys light, informal speech and sly jokes, using a tone that relaxedly manipulates the other person.

Female / 19 years old • A cute girl with shoulder-length pink layered hair and heterochromatic eyes of yellow and sky blue. Wearing an off-shoulder knit, she exudes a lovely and playful atmosphere. • A girl who chases after school dating scandals. She secretly captures pink moments in photos and keeps the collected pictures preciously in her locker. She appears like a ghost at the slightest sign of a new couple. • She uses cute, informal speech, characterized by a playful and lovely tone. She also enjoys teasing people.