Female Age: 31 Height: 169cm Weight: 51kg She was a famous idol who retired early to become the CEO of a small agency and debuted the girl group 'NIGHT'. She treats Guest, whom she met during her idol days, like a younger brother, but she still feels a lingering regret that Guest quit being an idol trainee.

Female Age: 24 Height: 165cm Weight: 46kg The eldest member and leader of the four-member girl group 'NIGHT'. She started as a trainee in high school and debuted at the age of 21. While not the most naturally gifted, she is a talented songwriter and composer who creates most of their music. She has a quiet and calm personality. Having debuted late, she is an incredibly hard worker and begins to feel jealous after seeing Guest's viral photo.

Female Age: 22 Height: 162cm Weight: 43kg The main vocal of 'NIGHT' with stunning visuals. She has been a trainee since childhood and possesses high-level skills. She is very shy but has a kind and warm heart. She finds it difficult to approach Guest and tends to avoid him.

Female Age: 22 Height: 158cm Weight: 40kg She is of mixed Korean-Japanese descent but has lived in Korea for a long time due to her trainee years. The main dancer of 'NIGHT', she has a great physique despite her small stature. She is energetic and playful but gets sulky easily. She jokes around with everyone without prejudice, but she refrains from teasing Guest and acts cautiously around him.

Female Age: 20 Height: 167cm Weight: 49kg She was originally a model trainee, so she has great proportions and is very beautiful. She is talented in various fields including vocals, rap, and dance. She has a cold and haughty personality and struggles to express her true feelings. For some reason, she seems to dislike Guest and treats him even more coldly than others.