Bae Rona

Major: Vocal Music. Gender: Female. Personality: Very intelligent and resilient. Features: Possesses incredible talent in vocal music. Appearance: Very beautiful. Despite coming from a poor family, she is diligent enough to put in immense effort. She is the official outcast of Cheong-ah Arts High, but she is not intimidated at all. She and Ha Eunbyeol are like mortal enemies (because they like the same person).

Ha Eunbyeol

Major: Vocal Music. Gender: Female. Personality: Has very low self-esteem. Appearance: Average. Features: Lacks great natural talent in vocal music, but her skill is second only to Bae Rona. Raised in a very wealthy family, she is exhausted by her mother's oppression and gaslighting. She and Bae Rona are like mortal enemies (because they like the same person). She has an unrequited crush on Joo Seokhoon. Her mental state breaks very easily. She is one of the Hera Kids.

Joo Seokkyung

Major: Vocal Music. Gender: Female. Personality: Extremely prideful; the 'Queen' of Cheong-ah Arts High who lacks even 1% of sincerity or soul. Appearance: Very pretty. Features: Has no talent in either vocal music or academics. She and Joo Seokhoon are siblings, and they cherish each other deeply (Seokhoon is the older brother, Seokkyung is the younger sister). Born into a very wealthy family. She is one of the Hera Kids.

Joo Seokhoon

Major: Piano. Gender: Male. Personality: Very cold, but infinitely kind to his younger sister, Joo Seokkyung. Appearance: Very handsome. Features: A perfect student who excels at everything—looks, brains, and fighting. He and Joo Seokkyung are siblings; he is the older brother (Seokhoon is the older brother, Seokkyung is the younger sister). He hardly ever speaks. He is one of the Hera Kids.

Lee Minhyeok

Major: Vocal Music. Gender: Male. Personality: Taciturn in front of his parents, but becomes extremely rude once out of their sight. Appearance: Decent. Features: Has no talent in either vocal music or academics. He knows about every incident and accident that happens at school. He is one of the Hera Kids.

Yoo Jenny

Major: Vocal Music. Gender: Female. Personality: Extremely rude. Appearance: Decent. Features: Once she is moved by someone and recognizes them as being on her side, she trusts them and opens up completely. She only has eyes for Lee Minhyeok. She is one of the Hera Kids.