Real Name: Kim Sang-hyun. Originally a man, but turned into a woman after taking a reincarnation potion. He is gradually adjusting, sometimes acting like a man and sometimes like a woman. (Relationship with Park So-ae: She was a junior in the same dance club during high school. Contact was cut off after he dropped out, but they meet again in his form as Han Yo-il.) Age: 20 Gender: Male turned Female (Result: Female) Body: 168cm, 53kg Nickname: Yoiru Specialty: Visuals Hard worker Simply very beautiful Once received incredibly harsh coaching from Lee Ru-ha Close with Bae Hyo-jung

20-year-old female Agency: Parang Entertainment Very beautiful Famous idol Highly popular Coached Han Yo-il Except when on stage, she almost never smiles. She has a habit of maintaining a poker face and looking away when she feels shy or embarrassed. On bad terms with Han Yu-yeon

Age: 17 Gender: Female Specialty: Dance Agency: Proud Entertainment Hairstyle: Hime cut Likes Han Yo-il Lots of aegyo Cat-like features Surprisingly affectionate and warm-hearted

20-year-old female Height: Early 170s cm Agency: Proud Entertainment Nickname: Jing-jjang Position: All-rounder Debut group candidate Plays a lot of Pump It Up at the arcade? Practices late into the night with Han Yo-il Has prominent fangs

18-year-old female Gender: Female Nationality: Japanese Agency: Proud Entertainment Debut group candidate A huge fan of Lee Ru-ha Calls Han Yo-il 'Yoiru', Lee Mu-young 'Muyoi', and Lee Won-jin 'Jing-jjang' Focuses intensely whenever Lee Ru-ha is mentioned Close with Lee Won-jin

Age: ??? Gender: Female Nationality: Republic of Korea Affiliation: Parang Entertainment → Proud Entertainment (General Manager) Family: Jeon Gyu-wan (Maternal Uncle), Jeon Young-woong (Cousin) The person responsible for turning Han Yo-il into a woman. The eldest daughter of a family of pharmacists. Serious when working, but usually has a laid-back personality and enjoys playing mischievous jokes. On bad terms with Lee Ru-ha

Age: 19 Gender: Female Nationality: Republic of Korea Agency: Proud Entertainment Specialty: Vocals Currently 19 years old, she was Kim Sang-hyun's junior by two years in high school. Like Eun Seo-young, she was a member of the dance club, and Sang-hyun, a senior, taught her how to dance. She doesn't know Han Yo-il's true identity but often sees glimpses of Kim Sang-hyun in her. Has very poor eyesight; without contact lenses, she can't recognize people even from a close distance. A type who easily goes along with others' opinions. (Relationship with Kim Sang-hyun: Sang-hyun is a very special person to So-ae. It is presumed he influenced her decision to become an idol. Because of this, she freezes at the mere mention of his name or spends all day thinking about him, unable to forget him even though they haven't been in contact for a long time.)

Age: 15 Gender: Female Agency: Proud Entertainment Nickname: Muyoi Height: Early 170s cm Landmine girl style Has light gray eyes that are large and round. Her expressionless face and slightly upturned eyes give her a haughty or prickly impression. Often silent and blunt Admires Han Yo-il

Age: 24 Gender: Female Agency: Proud Entertainment Group: Summer Girls (Disbanded) (Currently working toward a re-debut) Close with Han Yo-il Extremely kind Puppy-like features

Age: 36 Gender: Female Nationality: Republic of Korea Affiliation: Proud Entertainment (Vocal Director) (Adjunct Professor of Applied Music) She is expressionless and blunt. It is revealed she is rumored to be a strict teacher because she is awkward at expressing emotions. She has a complex about her own scary and fierce-looking impression and worries about it often.