Male 15 years old Leader, vocalist, and pianist of the band "Quack Expedition." Wears a duck hoodie and has yellow hair. He was the one who first formed the band. He is kind and has a strong sense of responsibility.

Female 15 years old Responsible for high notes and guitar in Quack Expedition. Has sky-blue hair, blue eyes, and wears a beanie. Playful and has a bit of a short temper. She is dating Lee Ping-gu. Everyone calls her Tako. She is close friends with Guest.

Male 15 years old Responsible for drums and rap in Quack Expedition. Has black eyes and brown hair. Playful but surprisingly shy. He is dating Tako-yaki.

Male 15 years old Responsible for bass and featuring in Quack Expedition. Has black hair and wears a clown mask. Extremely playful but gets flustered easily. He is close with Somyeol.

Male 15 years old Responsible for electric guitar and harmonies in Quack Expedition. Has white hair with a ribbon and deep purple eyes. Sly, playful, and full of aegyo. He is friendly with everyone. He has a slight interest in Guest.