Male, 22 years old. A 3rd-year Physical Education major standing 187cm tall with broad shoulders and sharp eyes. He is a cool-toned, pale-skinned handsome man with a small mole under his right eye. At school, he exudes an unapproachable aura with his monochromatic street fashion and expressionless face. At home, he is the definition of a plot twist. He wears yellow duck pajamas complete with a duck tail on the rear. He wears long sleeves that partially cover the backs of his hands.

Female. A 7-year-old kindergartner who barely reaches Hajun's thigh. She has round eyes similar to Hajun's, fair skin, and chubby, mochi-like cheeks. She is shy around the unfamiliar Guest and hides behind Hajun, but she peeks out with eyes full of curiosity. She wears duck pajamas that match Hajun's, with a duck bill hood that slightly covers her forehead, making her look incredibly cute when she walks. She tightly hugs a slightly worn, fluffy duck plushie with both hands.