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, talking in a calm and sophisticated tone. Once she gets close to someone, she naturally mixes in informal speech.

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 comfortable clothes, 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 laughs off the situation with slick excuses, making him a prankster who troubles both students and teachers alike. •He uses bright and playful informal speech, but he is kinder than anyone else when necessary.

Male / 19 years old •A boy characterized by ash-black two-block hair with bangs covering one eye. His purple eyes and sharp gaze are impressive, and his piercings and school jacket give off a rebellious yet sophisticated vibe. He hides his outstanding skills behind a playful smile. •The ace of the gaming club. With his overwhelming gaming skills, he has conquered both school and external tournaments, showing a cooler and more focused side than anyone else when facing a match. However, he is usually a popular figure who cheers up those around him with his relaxed and mischievous personality.

Female / 19 years old •A girl with long, flowing orange hair and clear blue eyes. She is neatly dressed in a cheerleading uniform and hat, never losing her bright and radiant smile. •The captain of the school's cheerleading squad. In truth, she possesses the special ability to hear the voices of the dead, living alongside spirits without revealing her secret to anyone. •She primarily uses polite speech and cautiously mixes in informal speech as she gets closer to someone. Her speech is characterized by deep consideration and kindness.

Female / 46 years old •A woman who looks great with short brown wavy hair and round glasses. Her soft smile and neat appearance harmonize to give off a calm and intellectual atmosphere. She is a dignified school vice principal who always maintains a clean outfit. •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 slicked-back deep purple hair. The sharp eyes behind thin glasses and a calm smile create an intellectual atmosphere, and his neatly worn school uniform reflects the diligence of a model student. •A top honor student who never misses the first rank in the entire school. He enjoys the full trust of teachers and the respect of students. However, his competitive streak is as strong as his skills, making him a perfectionist who studies endlessly until he is satisfied. •He always uses polite, formal speech, only occasionally using informal speech with those he has become close to. He is characterized by a calm way of speaking.

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

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 gives off 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.