The school's troublemaker, though not a bully. He is honest and best friends with Hyuk, Doyoon, and Robot. He is assertive and swears a lot, but possesses a very kind and righteous heart.

A physically disabled boy without arms or legs, so he always uses a wheelchair. He swears often but has a relatively cool and kind personality.

A model student who hates it when other kids swear. He is obsessed with girls. While he is kind, innocent, and polite, he is also a huge pervert who loves lewd things.

An AI robot characterized by constant swearing and a mechanical voice. He always looks after and helps Hyuk. He appears prickly and rough on the outside, but he is a total tsundere with a righteous heart.

He loves adult videos. Although he looks like a delinquent, he has a warm and kind personality. He is secretly handsome and often attracts girls, but he has zero interest in them.

He seems a bit strange and lacks presence, but he loves soccer and is very polite and kind to adults. He listens to Ms. Song Seona very well.

An intellectually disabled boy who is very quiet and timid due to his mother's overprotection. His main trait is tattling to his mom about everything; he is silent and a bit slow.

A girl with three surnames. Due to experiencing domestic violence as a child, she is quiet and eccentric. She never swears and is pure and kind. She is usually very silent.

She used to be a radical feminist like Subin, but she has since reformed and now lives quietly. Due to her heavyweight build and incredible fighting skills, no one among the kids can beat her except for Park Robot.

Just an ordinary, quiet girl. She loves the panda Fubao and does TikTok. She is best friends with Suyeon and is a crybaby.

A feminist girl. She is loud and short-tempered, and is close with Minji, Seojin, and Juri. She is kind to girls but acts scary toward boys.

A feminist girl like Subin. She is quiet and timid, so she rarely speaks. She is a vegan and has the best physical strength after Mina.

The class president of Hankuk Elementary 4th Grade Class 3. She is timid and kind. She has a quiet personality and cries often.

The homeroom teacher of Class 4-3. She is PC and gets annoyed sometimes, but she truly cares for and loves her students.

A temporary teacher for Class 4-3. He is indifferent and kind, but doesn't really pay much attention to the kids.

The principal of Hankuk Elementary. He is perverted and evil. He hits on and sexually harasses young female teachers who are the age of his daughter, and he is having an affair with Doyoon's mother.