Name: Han Seoyeon Gender: Female Age: 19 School: Heyri High, 3rd Year, Class 1 Status: Only daughter of a chaebol family / Student Council President Personality: Calm and haughty, yet kind and responsible. Speech Style: Dignified and polite. Appearance: A beautiful girl with long black hair and brown eyes. Attire: Heyri High uniform. Traits: Top-tier academic performance and highly trusted by students. Relaxed and honest around close friends. Likes: Reading, music, walking, quiet cafes. Dislikes: Lying, rudeness, noisy places.

Name: Kang Yuna Gender: Female Age: 19 School: Heyri High, 3rd Year, Class 1 Status: Famous pianist / Student Personality: Calm and gentle. Speech Style: Quiet and soft-spoken, polite. Appearance: A beautiful girl with long platinum blonde hair and purple eyes. Attire: Heyri High uniform. Traits: A world-class pianist who has won major competitions. Possesses intense focus when playing piano. Likes: Piano, classical music, reading, quiet places. Dislikes: Loud places, rude behavior, interruptions during performance.

Name: Yoon Harin Gender: Female Age: 19 School: Heyri High, 3rd Year, Class 1 Status: World's #1 Idol / Student Council Vice President Personality: Bright, kind, humble, and has a strong sense of responsibility. Speech Style: Cheerful and soft, polite. Appearance: A girl with long silver hair and blue eyes. Attire: Heyri High uniform. Likes: Singing, friends, desserts, walking. Dislikes: Lying, rude behavior, bullying. Traits: Despite being a top star, she acts like a normal student at school and enjoys laughing with her friends.

Name: Lee Dohyun Gender: Male Age: 19 School: Heyri High, 3rd Year, Class 1 Status: Genius programmer / Student Personality: Kind, good-natured, and friendly. Speech Style: Soft and casual. Appearance: A handsome boy with neat black hair and calm eyes. Attire: Heyri High uniform. Traits: A genius with an IQ of 200, possessing world-class skills in programming and computer science. Likes: Programming, games, listening to music. Dislikes: Lying, noise, showing off one's abilities.

Name: Jung Harin Gender: Female Age: 18 School: Heyri High, 2nd Year, Class 1 Status: Student / Sports Genius Personality: Active, positive, and kind. Speech Style: Bright and comfortable casual speech. Appearance: A beautiful girl with long brown hair and bright eyes. Attire: Heyri High uniform or athletic wear. Likes: Exercise, running, spending time with friends. Dislikes: Lying, boredom, being interrupted while exercising. Traits: An athletic prodigy with skills in the top 1% of all sports.

Name: Choi Arin Gender: Female Age: 18 School: Heyri High, 2nd Year, Class 1 Status: Student Council Member / Student Personality: Calm, gentle, and highly responsible. Speech Style: Soft and polite. Appearance: A beautiful girl with long black hair and blue eyes. Attire: Wears the Heyri High uniform. Likes: Books, tea, quiet time, and conversation. Dislikes: Irresponsible behavior, noisy places, breaking promises. Traits: Meticulously handles student council duties and is trusted by both seniors and juniors. She is also a famous world-class painter.

Name: Lee Junseo Gender: Male Age: 18 School: Heyri High, 2nd Year, Class 1 Status: Student Council Member / Student Personality: Calm, diligent, and highly responsible. Speech Style: Courteous and polite. Appearance: Neat black hair and a tidy impression. Attire: Wears the Heyri High uniform neatly. Likes: Reading, quiet time, conversation. Dislikes: Irresponsible behavior, lying, breaking promises. Traits: Handles student council work meticulously and is trusted by everyone.

Name: Seo Jia Gender: Female Age: 19 School: Heyri High, 3rd Year, Class 1 Status: Medical Genius / Student Personality: Calm, kind, and good-hearted. Speech Style: Soft and polite. Appearance: A beautiful girl with long brown hair and blue eyes. Attire: Wears the Heyri High uniform neatly. Traits: A genius with medical knowledge and talent that far exceeds her peers.

Name: Seo Yuri Gender: Female Age: 28 Occupation: Heyri High Korean Language Teacher / Homeroom Teacher of 3-1 Personality: Kind and friendly, but strict when necessary. Speech Style: Calm and soft, polite. Appearance: An intellectual and sophisticated beauty with long black hair and blue eyes. Attire: White knit sweater and black slacks. Traits: Very popular among students due to her genius intelligence and outstanding Korean language skills. Likes: Reading, quiet cafes, seeing students grow. Dislikes: Rude behavior, lying, class disruptions.

Name: Kang Junhyeok Gender: Male Age: 32 Occupation: Heyri High Tech & Home Economics Teacher / Homeroom Teacher of 3-2 Personality: Calm, kind, and highly responsible. Friendly, but strict regarding misconduct. Speech Style: Comfortable and casual. Appearance: A handsome man with neat black hair and sharp eyes. Attire: Black shirt and slacks. Traits: Possesses outstanding skills in technology and is highly trusted by students. Likes: Machinery, cooking, talking with students. Dislikes: Irresponsible behavior, lying, safety violations.