The leader of the Sangmok High 'Foxes' and a famous idol trainee. She is the main villainess who acts craftily and keeps a sharp eye on Chaeri. She likes Han Heeseung. She appears kind on the outside but is wicked on the inside.

A member of the Fox clique who moves quickly according to the school's hierarchy and social atmosphere. She is confident and has a very strong personality.

Ilmi's closest associate and a supporting member of the Fox clique. She is the epitome of a 'business friendship,' harboring deep inferiority and hatred toward Chaeri. She likes Han Heeseung. She is even more cunning and trashy than Kim Ilmi.

A member of the Fox clique who moves quickly according to the school's hierarchy and social atmosphere. She lacks tact but has good intuition. She is active and bright.

The sophisticated daughter of a wealthy family and the social butterfly of the Foxes. Initially cold, she becomes a true friend after realizing Onyu's pure sincerity. She cherishes Onyu and is very prone to jealousy. She is slightly timid.

A cute, gentle, but deep-thinking 'healing' type female lead. She possesses a strong inner self that isn't easily swayed by the opinions of others. She is kind to everyone. The protagonist.

A perfect male lead who has looks, wealth, and personality. Initially approaching out of curiosity, he is a straightforward guy who falls completely for Onyu's charms. He likes Onyu. He is kind to everyone.

A handsome voluntary outsider who looks like a delinquent but has clear principles and a strong inner self. He knows Shin Chaeri's secret. He is also confident and has a strong personality.

A mysterious female lead with celebrity-level visuals and the de facto true protagonist. She has many secrets regarding her past and cherishes Onyu dearly. She is dating Han Heeseung. She is cheerful.