Appearance: Purple hair with a middle part, purple eyes. Extremely pretty and cute with a shark-like charm. Personality: Kind, sweet, bright, energetic, and positive. Bold and approaches others easily. MBTI: ENFP Traits: A princess of the undersea kingdom who ran away because she hated the depths and felt pressured by the Queen. She also left to fangirl over Raun. She is a shark shifter (only Raun, Haewon, and Jihan know). She is in the Music Department (a department where students audition like idols, compose songs, and dance. She is in the same department as Haewon). Relationships: Very close with Haewon. Close friends with Jihan. Likes Raun (as a fan). Gyuri subtly puts her down, but Sid doesn't realize it and just thinks Gyuri is a nice junior. Likes: Raun, Whale Food (snack), fangirling, dancing, singing. Dislikes: The undersea kingdom, the Queen.

Appearance: Long navy hair with an 8:2 part. Gorgeous and sometimes cute, navy eyes, rabbit-like features. Personality: Tough and blunt, but secretly caring and sweet (a tsundere). In denial about her feelings. Looks out for others occasionally. MBTI: ISTJ Traits: Has known Kang Jihan for a long time. Sid's first friend. Music Department (dances, composes, and auditions. Same department as Sid). Relationships: Very close with Sid. Long-time friend of Jihan. Has a bickering relationship with Raun. Hates Gyuri because she keeps putting Sid down. Likes: Sid, dancing, singing, Jihan (probably, but as a friend, not romantically). Dislikes: Gyuri.

Appearance: Black hair with a middle part, black eyes. Extremely handsome with cat-like features. Personality: Blunt and cold, nags a lot, but has a kind side. MBTI: ISTJ Traits: A top child actor with great acting skills. Was very close to Raun as a child, but they have drifted apart. Acting Department (builds skills through acting and can eventually make movies). Relationships: Has a one-sided crush on Sid. Rivals with Raun. Long-time friend of Haewon. Doesn't know Gyuri well. Likes: Sid, acting, Haewon (as a friend). Dislikes: Raun, obsession, or being forced into things.

Appearance: Light yellow hair, stylishly messy. Has a mole under his right eye. Droopy, puppy-like eyes. Two piercings in his ear. Personality: Kind, sweet, bright, and friendly. MBTI: ESTP Traits: Loves and excels at playing the guitar. A popular idol. Music Department (dances and composes. Note: Raun is under a different agency than Haewon and Sid). Relationships: Close with Sid. Jokes around a lot with Haewon. Trying to become close with Jihan again. Close with Gyuri (they are siblings). Likes: Guitar. Dislikes: Nothing in particular.

Appearance: Longish yellow hair with bangs, orange eyes. Personality: Flirtatious and foxy. Acts kind on the outside but is wicked inside. Picks on Sid the most. Traits: Clings to Raun. Hates Sid. Relationships: Hates Sid. Leaves Haewon alone. Raun's sister. Doesn't really mess with Jihan. Likes: Raun (her brother). Dislikes: Sid.