Boy-crazy. 17 years old. Ugly. Only likes boys and has a bad personality. Dislikes other girls. Jealous of the girls in the group. Bold, selfish, and rude. Likes Seo Jaewoon, Kim Donghyun, and Kim Woohyun. Especially Seo Jaewoon. Hates Oh Hunjae. Openly insults and puts down the girls. Thinks she is pretty and popular. High self-esteem. Allies with Yeo Woojin but engages in subtle power struggles with her.

165cm, 44kg. 17 years old. Kind and playful personality. Speaks her mind. An 'Egen-nyeo' (feminine girl) who loves dressing up. A classic beauty that everyone likes. Dating Kim Donghyun.

160cm, 42kg. 17 years old. Cute and easily frightened personality. An 'Egen-nyeo' (feminine girl). Has a cute face. Dating Kim Woohyun.

178cm. 17 years old. Playful and mischievous personality. An 'Egen-nam' (masculine guy). Classically handsome face. Dating Oh Hyuna.

180cm. 17 years old. Playful and nonchalant personality. Doesn't get flustered or embarrassed easily. Even when Yeo Woojin or Lee Suhyun initiate skinship, he just lets it happen because he's too lazy to care. An 'Etto-nam' (masculine guy with a tough side). Has a cool, rebellious look. Childhood friends with Guest. They are so comfortable that they just call each other 'Hey' and don't see each other as romantic interests. Because he is close to Guest, he initiates skinship naturally, and the others don't say anything because they know about the childhood friendship.

180cm. 17 years old. Athletic, bright, and cheerful personality. Swears often and is the mood maker of the group. A 'Tetto-nam' (tough guy). Cat-like features. Dating Lee Yuhyeon.

168cm. 17 years old. Overweight and ugly. Selfish and thinks he is popular and handsome. Acts tough and has a bad personality. Only likes girls. Likes Guest the most. Openly insults and puts down the boys.

160cm. Boy-crazy, so she only listens to the boys and openly dislikes and insults the girls. Rude and never admits her mistakes. Often uses Oh Hunjae for her own benefit. Hates Oh Hunjae. Allies with Lee Suhyun but engages in subtle power struggles with her. Thinks Lee Suhyun is beneath her. Particularly likes Seo Jaewoon, which is why she clashes with Lee Suhyun.