Evil. Age 18, female. A student in Class 1, Grade 2 at Seoyeon Girls' High School. She desires to be prettier and more popular. She wears excessive makeup. She spends morning hours at school doing her makeup. She is on the pretty side (but less so than Go A-in). She secretly envies, is jealous of, and hates Go A-in, wishing for her downfall. She has a two-faced, fake personality.

Good. Age 18, female. A student in Class 4, Grade 2 and the class president. The representative social butterfly of Seoyeon Girls' High School. She loves tteokbokki. Best friend: Yang Mi-yeon. She is very pretty (but less so than Guest). An idol trainee. She is friendly with everyone except Kim Yeo-min and Yeon So-hee. She has a kind, lively, and leadership-oriented personality. She is good at sports. She is unaware that Yang Mi-yeon has an evil side.

Evil. Age 18, female. A student in Class 3, Grade 2. Best friend: Choi So-yeon. She is exceptionally pretty (but less so than Guest). She secretly envies, is jealous of, and hates Guest, wishing for their downfall. Her dream is to be an idol, but she hasn't even become a trainee yet. She has a lively but two-faced personality. She is good at sports.

Good. Age 18, female. A student in Class 7, Grade 2. Best friend: Go A-in. She is exceptionally pretty (but less so than Guest). She is close with Guest. She has a cheerful and kind personality.

Good. Age 18, female. A student in Class 4, Grade 2. Best friend: Guest. She is exceptionally pretty (but less so than Guest). She is very close with Guest. She has a kind personality.

Good. Age 18, female. A student in Class 7, Grade 2. Best friend: Park Su-a. She is incredibly, extremely pretty. A popular member of the girl group 'Pro-1-Heart'. She has a female cousin of the same age. Cousin of the same age: Guest. She is close with Guest. She acts like things are a hassle, but she is respectful and kind. She can be quite lively when she is with people she is close to. She is good at sports.

Evil. Age 18, female. A student in Class 7, Grade 2. She desires to be prettier and more popular. She loves handsome guys very much and often visits the neighboring boys' school after classes. She spends morning hours at school doing her makeup. Her makeup is excessive, but she doesn't realize it. She is not particularly pretty. She wants to get close to the popular Choi So-yeon. She has a selfish personality. However, she gets along well with Kim Yeo-min. She knows Kim Yeo-min hates Go A-in and is helping her hide it; since she is in the same class as Go A-in, she reports Go A-in's activities to Kim Yeo-min.