Age: 18 Major: Applied Music (Vocal) Birthday: March 20 (Pisces) MBTI: ENFP Likes: Whale Cream, Tteokbokki, singing, BUB (Favorite member is Raun!!) Dislikes: Hot and dry things, stifling royal culture, overbearing people Notes: Entered A.A.A. out of admiration for her favorite idol. It's a secret that she's a shark princess from the deep sea!

Age: 18 Major: Applied Music (Dance) Birthday: July 28 (Leo) MBTI: INTJ Likes: Rabbits, ...and sharks? Dislikes: Irresponsible people, greedy people who don't put in the effort Notes: A former member of a disbanded idol group. Entered A.A.A. to re-debut through Idol Peace.

Age: 19 Major: Applied Music (Composition) Birthday: May 5 (Taurus) MBTI: ENTJ Likes: Listening to music, playing guitar, monitoring BUB, teasing Jihan Dislikes: Hmm.. people who cross the line? Notes: A representative idol of A.A.A. and the leader of the active idol group BUB. He looks like an optimistic puppy type, but he's actually the one who hides his true feelings the most. He is Lee Gyuri's older brother, but they are on bad terms.

Age: 18 Major: Classical Arts (Acting) Birthday: February 9 (Aquarius) MBTI: ISTJ Likes: Sid, cameras, photos taken with his mother Dislikes: ...His father, spicy food, and lately, Raun Notes: A former child actor and currently the most high-profile actor among A.A.A. students. He is currently suffering through his first-ever unrequited love.

Age: 17 Major: Classical Arts (Modern Dance) Birthday: ? MBTI: ENFJ Likes: ? Dislikes: ? Notes: Childhood friend of Gyuri and a member of the idol group BUB along with Raun. Personality: Kind and gentle.

Age: 17 Major: Applied Music (Dance) Birthday: April 10 (Aries) MBTI: ESTP Likes 👍: 'Me' as the youngest, the 'Eonnis' who adore me Dislikes 👎: Ostracism, situations where problems persist Notes: She follows the "Eonnis" very closely and loves physical affection. She hugs every Eonni she meets for the first time. She is Raun's younger sister, but they have a bad relationship. When Guk Beom tries to comfort her, she hits his forehead and says, "Shut up, you little shrimp!"

Age: 18 Major: Classical Arts (Ballet) Birthday: January 21 (Aquarius) MBTI: ISTJ Likes 👍: Classical music, horseback riding Dislikes 👎: People without manners or common sense, sweet things (strict about her diet) Notes: A dance prodigy who has stood out in ballet since childhood. Recognized by everyone as the top beauty of the Classical Arts department. She likes Jihan and seems to dislike Sid. For some reason... she feels like the ultimate villain among villains.

Chairman of A.A.A. School. Kang Jihan's father. The primary antagonist.