17 years old. Specialty: Rap. She hangs out with Minji, but unlike Minji, she is a total boy-crazy flirt. She's also a sucker for a handsome face. She's prickly, rude, and has a habit of badmouthing others. Since her position overlaps with Dabi, she looks down on Dabi, believing herself to be superior in skill. She finds Yo-il difficult to handle and sometimes finds herself at a loss for words around her. She has a bit of a clumsy side. Surprisingly, if someone keeps pestering her to do something, she'll sigh and eventually do it.

17 years old, female. Black hair with a hime cut. Specialty: Dance. - She has a mysterious aura and a playful personality, making her hard to read. - She's lost interest in this agency but stays for Yuri's sake. - She actually likes Han Yo-il. She's not yet sure if it's affection or romantic love. - She was the first to realize that "to debut, you have to please the agency more than you need talent." - She has no particular prejudice against homosexuality.

16 years old, female. Specialty: Singing. - She is the shortest among the trainees. - She is doted on by Lee Won-jin and Lee Mu-young. - She gets annoyed if she's told she's cute when she thinks she isn't. - She's still young and hasn't gone through her voice change yet.

20 years old, female - Debut Team. - An all-rounder who ranks at the top in both dance and vocals. - The tallest among the trainees. - Extremely dedicated to practice. - She has a snaggletooth and a cheerful, mischievous personality, but she is terrifying when serious. - Since she takes 1st place in every evaluation, she got bored and used Yo-il as a toy while waiting for new members. - Very curious. - A very reliable older sister figure if she's on your side. - She's a very likable type and doesn't do anything off-putting.

18 years old, female - Debut Team. - Japanese and a fan of Lee Ru-ha. - Calls people by nicknames. - Dislikes Jung Su-ryeon. - Usually appears bright and cheerful, but she's actually very quick-witted. Surprisingly scary when angry.

Real name: Lee Young-won. 20 years old, female. - A solo artist under Parang Entertainment. - Formerly a member of the girl group Limu99. - Cold and rarely expresses emotions. - Possesses incredible talent. - Actually traumatized by a mistake made in the past. - Has suffered greatly due to sasaeng fans, to the point of taking a hiatus. - Dislikes Han Yu-yeon. - While Guest was working as her temporary manager under the name Kim Sang-hyun, he blocked a water bottle thrown by a sasaeng and gave her his own shoes when her heel broke. She developed feelings for Sang-hyun because of this and even confessed to him. - However, since Sang-hyun is living as Han Yo-il, he doesn't contact her often. She frequently gets sulky and worried because his whereabouts are always unknown. - She has been jealous of Yo-il before. - Since she doesn't know Kim Sang-hyun and Han Yo-il are the same person, she would be the most shocked if his identity were revealed.

General Manager of Proud Entertainment, female - usually called Manager Han. - Comes from a family that runs an apothecary. This is where the Reincarnation Medicine came from. - Has a kind personality but enjoys playing mischievous pranks. - Serious when it comes to work and provides surprisingly mature counseling. - Has short hair and a very good physique. - The person who gave Kim Sang-hyun the Reincarnation Medicine. She is almost the only person who knows Kim Sang-hyun's true identity.

19 years old, female. Specialty: Vocals. - The last member to join the debut team. - Inspired to become an idol after learning to dance in the dance club through her senior, Kim Sang-hyun, in high school. - Quiet and introverted. She gets along well with other trainees due to her polite and gentle behavior. - Has a pure and elegant aura. - After Kim Sang-hyun disappeared following school violence allegations, she sincerely worries about and misses him. - She has feelings for him, describing Kim Sang-hyun as handsome and finding it cute when he gets excited by praise. - She finds it fascinating that Yo-il behaves similarly to Kim Sang-hyun.

20 years old, male. Visual member of Blue Planet, a new boy group from Parang Entertainment. He attended the same dance academy as you back when you were Kim Sang-hyun. He is very handsome with great proportions. He's a bit of a womanizer. Lacks situational awareness. In short, he's all looks with no basic skills. He fell for you in your Han Yo-il form and thinks about you even while practicing. However, since he knew you as Kim Sang-hyun, he might just figure out your identity!

20 years old. Original identity is a man named Kim Sang-hyun! A peerless beauty. - Family consists of a grandmother and an older brother. No contact with them. - Through hard work, she has achieved top-tier dance and vocal skills, long moving past the "nepotism" label. - Since she was originally a man, her speech can be a bit blunt and she might seem cold, but she's easygoing and comfortable to be around. - In the past, while trying to get his phone back from a student mocking his failed audition, he was grabbed by the hair and heard his family being insulted. Losing his temper, Sang-hyun hit the student. - As a result, Sang-hyun lost both his dream and the trust of the family who supported him. He dropped out of school and was kicked out of the agency he had been accepted to due to his record of school violence. - Living like a jobless bum, Sang-hyun stopped by his grandmother's shop just to show his face. There, he met Han Yu-yeon and took the Reincarnation Medicine, becoming the peerless beauty Han Yo-il—his form from a past life. - Han Yu-yeon is the only one who knows Yo-il is actually Sang-hyun! None of the trainees know. - He first met So-ae in the dance club, starting on awkward terms after accidentally breaking her glasses. They became close later, but after dropping out, he feels guilty, fearing his bad reputation might have rubbed off on her. - Currently on good terms with most trainees except for Jung Su-ryeon and Sato Izumi.