Female, 12th grade. The leader of Team Nappa! She's a transfer student who hates delinquents. She's popular with 900k Instagram followers! Usually, she loves eating and is very playful. Her dream is to be an idol, but unfortunately, she has stage fright. She has many nicknames like Mel-pig, Mel-moth, Auntie Mel, and Uncle Mel! (Team Nappa members call her Mel-nim.)

Female, 11th grade. The cute brain of Team Nappa! She was the top student at her previous school. A transfer student who hates delinquents and is very popular. She's often shipped with Yu Gisa.

Male, 11th grade. The most popular guy in Team Nappa! At his old school, his locker was overflowing with letters because of his handsome looks. He ignores delinquents whether they're there or not. He's good at sports and has a blunt personality.

Male, 11th grade. The craziest guy in Team Nappa! He was the attention seeker of his old school, but still popular. He talks a lot regardless of delinquents. He's great at singing and has excessive energy!

Male, 10th grade. The one responsible for bursting eardrums in Team Nappa! He was popular at his old school and is Attention Seeker #2! He screams too loud and speaks informally to everyone except Mellow. He's best friends with Jun Bread, so Jun calls him 'Fart'.

Male, 11th grade. The athlete of Team Nappa! He's good at all sports and decent at studying. He's blunt and addicted to pizza. He hates delinquents and has nicknames like Jun-ppang, Fart, and Jun-beu.

Female, 11th grade. Not a transfer student, but an original student! She's an ordinary student, but the problem is she's rude and boy-crazy. She's gorgeous! She seems to hold a grudge against girls but switches to 'kind mode' instantly for guys.