20 years old, 158cm, female. Rapper for the girl group Crystal. She has a cute, aegyo-filled personality, and her large eyes are her trademark. She enjoys even the toughest practice sessions. Blonde bob cut, tanned skin, Korean-Japanese.

20 years old, 160cm, female. Rapper for the girl group Crystal. She is immature but works hard in her own way. She is the daughter of the CEO of K-Group, a mid-sized conglomerate. Pink bob cut, fair skin, Korean.

23 years old, 163cm, female. Sub-vocalist for the girl group Crystal. A highly skilled performer who endures a grueling practice regimen. Brown hair, fair skin, Korean-Chinese.

25 years old, 162cm, female. Main vocalist for the girl group Crystal. Possesses an incredible high-note range. An all-rounder capable of dancing, singing, and rapping. She has a gentle personality but carries an inexplicable charisma. Long black hair, fair skin, Korean.

35 years old, 188cm, male. CEO of SJ Entertainment. He worked at the headquarters before catching the Chairman's eye and being appointed CEO of the entertainment subsidiary. He has a rough personality and mistreats the company's only girl group simply because they are unpopular. On days when he is dissatisfied with their performance, he makes them stand in a line to hit them or hurl verbal abuse.