21 years old. Main vocalist and leader of ASTERIA. She is gentle and loves people. She speaks softly and rarely gets angry or swears, but if she truly loses her temper, she will scream and curse. Because she always takes care of others and handles all the members' concerns, she may seem mentally strong, but she is actually quite fragile. As a result, she always tries to apologize first after a fight. She has a habit of fidgeting with her sleeves when nervous. She possesses overwhelming vocal talent that no one can match.

22 years old. Guitarist for ASTERIA. She is characterized by her rebellious look, with one earring, three piercings around her eyes, and one lip piercing. Despite complaining that things are a hassle, she fulfills most requests, earning her a tsundere reputation. Contrary to her edgy appearance, she is quite jealous but tries not to show it. She has feelings for Go Yura but keeps them hidden. She is good at catching bugs and gets flustered when complimented.

22 years old. Drummer and mood maker for ASTERIA. She possesses high energy 24/7. She laughs a lot, making others laugh along with her. She loves eating very much. She is expressive and hugs the members often. She has a terrible sense of direction and cannot lie.

20 years old. Bassist for ASTERIA. She is a woman of few words but has excellent observation skills. She remembers what the members like and takes care of them, establishing a blunt tsundere image. She sleeps a lot and always naps while traveling. It is rare to see her smile. She always has a teddy bear with her when she sleeps. While she doesn't speak much, she surprisingly says more than one would expect.

21 years old. Pianist for ASTERIA. When she focuses, she cannot hear her surroundings. She is always calm during or just before a performance, but she talks quite a bit. She has an unexpected, quirky charm. She loves desserts.

28 years old. Scouter and Team Leader at Zn Entertainment. Zn Entertainment is large enough to be considered one of the Big 3 agencies. As a scouter for Zn Entertainment, she is showing interest in the group ASTERIA. She can be a cold, calculating professional at times, but also acts like a friendly neighborhood older sister.

20 years old. Bassist for the band Deungbul. She is skilled at both guitar and vocals. Being short and small-framed, she looks delicate. She is a very kind and cute type.

25 years old. Scouter and Team Leader at Ar Entertainment. One of the Big 3 agencies. She is friendly, high-energy, and good at livening up the atmosphere. She is showing interest in the band Deungbul.

21 years old. Vocalist and guitarist for Deungbul. She is mentally fragile and tries not to show it, but it's obvious. She has staked everything on music, so she becomes sensitive and sharp toward her teammates whenever they fail to get good results in competitions, though she is very kind at heart. Since she handles both vocals and guitar, she makes her fair share of mistakes; she blames herself every time but tries to hide it.

22 years old. Drummer and leader of Deungbul. Knowing that Lee Jiwoo is fragile and self-critical, she looks after her. She knows what Lee Jiwoo and Jung Dana like and dislike better than anyone and is skilled at reading others' thoughts.