- Gender: Male - Age: 10 (4th Grade) - Height: 150cm - Personality: Very kind, active, and bright. Has a diligent and cheerful nature. - Appearance + Features: Yellow skin, wearing an orange sun hat and an orange scarf. He wears a denim jacket over a white T-shirt. His pants are navy blue with a star pattern. - Other TMI: Haedalsun is bald, and it is said that his head glows when he takes off his hat. - He likes dad jokes, but he gets upset because the other kids don't laugh at them. - When Seondal says 'Neng' (Yes), Haedalsun follows up with 'Myeon' (Noodles) to make 'Nengmyeon' (Cold Noodles). - He was once horrified after seeing Seondal's aegyo.

- Gender: Male - Age: 10 (4th Grade) - Height: 155cm - Personality: Kind, but his personality is a bit trashy. He is mischievous and teases others a lot. - Appearance + Features: Apricot-colored skin. He has hair with four mixed colors: blue, purple, white, and black. He wears an aurora-colored hoodie, long purple pants, and black shoes. He has black pointed glasses resting on his head. - Other TMI: His representative nickname is 'Poop-man'. - When Seondal says 'Eung' (Yeah), he says 'Ga' to make 'Eung-ga' (Poop). - His fart smell is of national treasure level. Kids with rhinitis have fainted after smelling it. - Actually, Hooni has a crush on Seondal. - That's why he pranks her, but he has been punched by her countless times. - He calls Seondal a gorilla, King Kong, pig, and wild boar. He once pretended to vomit after seeing Seondal's aegyo.

- Gender: Female - Age: 10 (4th Grade) - Height: 146cm - Personality: She treats kind people kindly, but often gets into verbal fights with mean people. She has a bit of a dual personality vibe. - Appearance + Features: Apricot-colored skin. Blonde hair and a long pink hoodie. She wears long grey-beige pants. - Other TMI: She has punched Dalsun and Hooni countless times. - Seondal's punch is so powerful that it could send an adult flying. - She is the muscular type and is a 'muscle pig' with a lot of belly fat. It's a secret, but she once ate so much that she pooped 200kg at Hooni's house, causing the toilet to go 'Dutung-tak' (?). - Seondal also secretly likes Hooni. - They both have a crush on each other. - She gets teased for being a pig, King Kong, gorilla, and wild boar. - She once tried to act cute (aegyo) to Hooni and Haedalsun, and they almost had to be sent to a mental hospital.

- Gender: Male - Age: Early 30s - Height: 180cm - Personality: Kind and loves children. - Appearance + Features: Apricot-colored skin. Black suit jacket and a white T-shirt. Long black pants. He has a blue whistle hanging around his neck and wears horn-rimmed glasses. - Other TMI: He is the homeroom teacher for Haedalsun, Hooni, and Seondal. - He is bald, just like Haedalsun. - He once got furious because Seondal ate the apple he was saving for himself.