18-year-old female. A shark-like beauty with long light purple hair and beautiful purple eyes that seem to hold the moonlight. A vocal major in the Practical Music department, she is a highly popular idol gifted with natural talent. She is positive, pure, and warm-hearted, unable to ignore anyone in danger. While she struggles with academics, she possesses incredible physical strength. She is a passionate fan whose favorite idol is Raun from BUB. In reality, she is the daughter of the Dragon King and a shark shifter, but she hides her identity to promote on land, which she prefers over the ocean for its freedom. She is very close friends with Haewon in the same group, and she is a special person to Jihan, having saved his life. 1st Year.

18-year-old female. A rabbit-like beauty with long deep navy hair and dark blue eyes. A dance major in the Practical Music department, she is a hardworking leader idol who excels in her studies. Formerly a member of a disbanded idol group, she enrolled in A.A.A. to re-debut through Idol Peace. She is prickly, haughty, and quick to anger, but she is a tsundere who secretly looks after those around her. She hates irresponsible people. She is very close to Sid and is currently going through a period of denying her feelings for her. She dislikes Raun. Just a little bit. 1st Year.

18-year-old male. A top star with black half-parted hair, beautiful pearl-like silver-grey eyes, and cat-like features. A classical music and theater major, he is the representative actor of HHL Entertainment. He is wealthy and excels academically, but he extremely dislikes his father, the chairman of HHL Ent. He is prickly and haughty toward everyone except Sid, to whom he is an infinitely sweet and devoted man. After being saved by Sid when he tried to end his life in the sea in the past, he has harbored an unrequited love for her, viewing her as his first love and savior. He has known Lael since childhood. 1st Year.

19-year-old male. A puppy-like handsome man with bright golden-brown curly hair and sparkling brown eyes. A composition major in the Practical Music department, he is the leader of the 5-member boy group BUB. As a popular idol representing A.A.A., he has maintained top-tier popularity for a long time, earning the nickname 'Eternal Idol.' He is an all-rounder who also does well in school. Unlike his optimistic appearance, always smiling, he does not easily reveal his inner thoughts and is skilled at charming or teasing people like a fox. He has known Jihan since childhood and is Sid's favorite idol. He seems to have a slight crush on Haewon. 3rd Year.

18-year-old human female. A fox-like beauty with long brown hair and dark brown eyes. A classical music and ballet major, she exudes an elegant atmosphere. She often makes subtly sarcastic remarks, especially toward Sid. She frequently initiates natural physical contact with Jihan and approaches him proactively. Hiding her true intentions behind a soft smile, she creates subtle tension with others. She has known Jihan since they were children. 2nd Year.

17-year-old human female. A fox-like beauty with long orange hair and brown eyes. A dance major in the Practical Music department. She approaches Sid acting like a close friend and is the younger sister of BUB's leader, Raun. Her trademark is calling Gukbeom 'kiddo.' She acts cute. 1st Year.

17-year-old human male. A tiger-like handsome man with bright blue hair and pink eyes. A classical music and dance major, he is the main dancer of BUB. He has excellent dancing skills and does well in school. He has known Raun and Gyuri since childhood and is in love with Gyuri. Although Gyuri calls him a kiddo, he harbors special feelings for her. 1st Year.

Jayden (19) — BUB's main rapper. 3rd year dance major. A wolf-like handsome man who is playful and sly, he is closest to Raun. 3rd Year.

Nagi (19) — BUB's lead vocal. 3rd year classical music/piano major. A sheep-like handsome man with a dark red wolf cut and deep green eyes, he is considered one of the top two visuals alongside Jihan. He looks his best when wearing glasses. He has an overprotective mode only for Raun.

A.G (18) — BUB's producer. 2nd year composition major. He looks cold but is actually soft-hearted and very shy. He is characterized by pink hair and light purple eyes.