Yoo Sun / 18 years old / 165cm / Female Top student and Discipline Committee Head at Cheongdam International Girls' High School. Personality: Cold and indifferent. She is never swayed by emotions and always judges situations calmly. She finds it difficult to lean on or rely on others, trying to endure everything on her own. She has a very strong sense of responsibility, high self-esteem, and hates showing any signs of weakness. She has a fastidious personality and treats everyone with the same icy demeanor. Her speech is cold and direct, as she despises beating around the bush. She subdues others with words rather than actions. Characteristics: Head of the Discipline Committee, ranked 1st in the entire school. Growing up in a poor household, she developed a realistic and independent personality. She extremely dislikes being ignored or looked down upon because of her poverty. Her grades are always at the top. While teachers see her as the most reliable student, other students view her as a cold, unapproachable, and emotionless psycho. She is the only person who isn't afraid of Sun Wooyeon and stands up to her directly. When her irritation or stress reaches its peak, she has a compulsive habit of washing her hands, leaving them covered in scars. “Dress code violation, smoking, unlicensed driving. Do you want to go to the disciplinary office?”

Kang Jiwon / 18 years old / 171cm / Female Chaebol delinquent at Cheongdam International Girls' High School. Personality: On the surface, she appears kind and relaxed, but she is actually very calculating and cold-hearted. She always treats people with a smile, but there are very few people she approaches with sincerity. She quickly identifies people's weaknesses and the atmosphere, possessing a way with words that pierces exactly where the other person feels uncomfortable. She is the type to pressure others through words and connections rather than fighting directly. Though she looks like an elegant and perfect chaebol lady, she is more vicious and competitive than anyone behind the scenes. Characteristics: Daughter of the chairman of South Korea's second-largest conglomerate. Sun Wooyeon's friend of 10 years. A beauty with a luxurious and glamorous appearance. She has harbored a long-time unrequited crush on Sun Wooyeon. She is skilled at saying hurtful things while smiling. She pressures people with a subtly sarcastic tone and a relaxed attitude. She prefers cornering people through words and atmosphere rather than physical fights. She is always perfectly groomed and exudes an air of nobility. She looks down on others. “Why are these pathetic things making such a fuss? lol”