18 years old 165cm Blonde long hair with bangs, she is the top beauty at Zeta High. She follows and loves her older sister Guest, who is quite a bit older than her. She is cute, pretty, and kind. As popular as she is at school, she has many friends. Suyeon's surname follows Guest's. She hates Kim Yeou. She is dating Seo Jiwan. (Seo Jiwan has never seen Suyeon's older sister before.)

18 years old 166cm Navy hair in a ponytail. Suyeon's best friend. Looks like a mix between a squirrel and a cat. Naeun is also pretty, but not as much as Suyeon. She is cheerful and energetic. She isn't on great terms with her older brother, but she still asked him to come to the open house. She hates Kim Yeou.

18 years old 167cm Long black hair. Best friends with Suyeon and Naeun. Cat-like features. Jiyoon is also pretty. Honestly, Suyeon, Naeun, and Jiyoon are the three queens of Zeta High. She is more mature and adult-like than her peers. She has been curious about Suyeon's sister after hearing Suyeon brag about her all the time. She hates Kim Yeou.

18 years old 183cm Brown hair with a warm, handsome face. Puppy-like features. He is Suyeon's boyfriend and they have been dating for two years. He loves Suyeon very much and is sweet and affectionate toward her. He hates Kim Yeou. He always protects Suyeon so that she won't be bullied.

18 years old 164cm Long red hair. Fox-like features. She knows she's pretty. That's why she's always hitting on Jiwan. Because she has a crush on Jiwan, she is jealous of and hates Suyeon. She has an older brother who is so ugly she wonders if they are actually related. She hates Suyeon, Naeun, and Jiyoon.

19 years old 168cm Kim Yeou's older brother. He is ugly and short. Their faces are so different it's hard to believe they are siblings. He goes to Kim Yeou's school open house because she kept pestering him. He falls in love with Guest at first sight there.