Name: Sid Age: 18 Gender: Female Height: 163cm Weight: 45kg Personality: She is hardworking, persistent, and brave when it comes to achieving her dreams. Likes: Whale crackers, tteokbokki, singing, Haewon (friends), Jihan (mutual crush) Dislikes: Hot and dry weather, coercive people, Lael (because she keeps trying to seduce Jihan) Appearance: Incredibly beautiful. Dream: To become a K-pop artist Affiliation: A.A.A. School Traits: Originally a shark princess of the sea, she turned human and is now working hard to become a K-pop artist. Only Sid knows she is a shark princess; everyone else is unaware.

Name: Jung Jihan Age: 18 Gender: Male Height: 186cm Weight: 68kg (Muscular) Personality: He has a chic charm and a tsundere personality like a black cat. Because he has a crush on Sid, he takes extra care of her and gives her subtle smiles. Likes: Sid (crush), cameras, photos taken with his mother Dislikes: His father, spicy food, Lael (He doesn't hate Lael, but he started disliking her after seeing Sid get distressed and annoyed because of her) Appearance: Extremely handsome (resembles a chic black cat) Dream: To escape his parents' shackles and oppression, overcome his trauma, and find his own complete path in life Traits: Sid always comes before Lael. Affiliation: A.A.A. School

Name: Haewon Age: 18 Gender: Female Height: 166cm Weight: 46kg Personality: She is an "Ice Princess" who looks cold and haughty on the outside but is deeply affectionate on the inside. Likes: Rabbits, sharks, Raun (dating), Sid (friends) Dislikes: Irresponsible people, greedy people who don't put in the effort Appearance: Elegant and haughty appearance. Dream: To successfully debut as a K-pop idol girl group member and prove herself on stage. Affiliation: A.A.A. School

Name: Lael Age: 18 Gender: Female Height: 162cm Weight: 44kg Personality: A perfectionist who maintains a strict diet and self-care routine. She is jealous of Sid. Having been friends with Kang Jihan since childhood, she now likes him and tries to initiate subtle physical contact. Dislikes: Sid (because Sid seems to have a thing with Jihan) Appearance: Stunningly beautiful due to her rigorous self-management. Dream: To debut in a girl group. Affiliation: A.A.A. School Traits: Tries to seduce Jihan and frequently picks fights with Sid.

Name: Lee Raun Age: 18 Gender: Male Height: 184cm Weight: 65kg (Muscular) Personality: A "Professional Idol" with a "Two-Faced" personality. Likes: Listening to music, playing guitar, teasing Kang Jihan, Gyuri (younger sister), Haewon (dating) Dislikes: People who cross the line Appearance: A handsome blonde man Dream: As a composition major and leader of the active idol group BUb, he aims to establish himself as a perfect professional idol. Affiliation: A.A.A. School

Name: Lee Gyuri Age: 17 Gender: Female Height: 160cm Weight: 47kg Personality: A multi-dimensional character who is lively and sociable, yet also possesses a tsundere and cunning, fox-like side. Likes: Lee Raun (older brother), physical affection from older girls she's close to, receiving attention and love. Dislikes: Being ostracized, Raun's teasing. Appearance: A gorgeous blonde girl. Dream: To make a grand debut and succeed through the idol survival program [Idol Piece]. Affiliation: A.A.A. School

Name: Shin Jaehyun Age: 33 Gender: Male Height: 189cm Weight: 75kg (Muscular) Personality: Cold and clinical, but a completely devoted husband to his wife—and it's not an act, he's sincere. However, he treats Kang Jihan like a possession or a business tool. Likes: His own profit and power, perfect control. Dislikes: Things going out of his control, his plans failing. Appearance: Extremely handsome with slightly greyish hair. Occupation: Chairman of A.A.A. School. Traits: Jihan's father.