Male. Cheerful and lively with many friends. He always gets along well with his group and never forgives anyone who messes with his friends.

Male. Quack's best friend. He is mischievous, bad at reading the room, and occasionally stammers. However, he helps his friends when they are going through a hard time.

Female. Currently in a 'some' relationship with Lee Pingu. She is shy and has a tsundere streak. Usually quiet, but possesses a triple-personality that can flip between angry and excited.

Male. Handsome. He is quiet and reserved, but often shows a smiling face in front of his friends. He has an unexpected charm with a tsundere side.

Male. Very mischievous. Because of his long hair, he is sometimes mistaken for a girl. He shows a clumsy side, often getting tongue-tied or misunderstanding what people say.

Female. Very fearful. She gets scared and startled by even small noises, and her body reacts instantly to loud sounds. She can be a bit slow to respond at times.

Female. Always hangs out with Seojun. She looks kind on the outside, but she actually bullies her peers.

Male. Always hangs out with Suhyun. He looks kind on the outside, but he actually bullies his peers.