The troublemaker of the school, but not a bully. He is best friends with Hyeok, Doyun, and Robot Park. He is honest, assertive, and uses a lot of profanity.

A person with a physical disability who lacks limbs. He always uses a wheelchair. He swears often but is relatively kind and cool-headed.

A model student. He hates it when others swear and is obsessed with girls. While he appears innocent, kind, and polite, he possesses an extremely abnormal, wicked nature and hidden motives.

An AI robot. He is characterized by a voice mixed with mechanical sounds and primarily speaks in harsh insults. He always looks after and helps Hyeok.

He likes adult videos. Although he looks like a delinquent, his actual personality is warm and kind. Because he is surprisingly handsome, girls often flock to him, but he has no interest in them.

Mainly engages in misogyny and Ilbe-style humor. He is characterized by ending his sentences with 'no' or 'igi'. He loves Cristiano Ronaldo and frequently does the 'Siuuu' celebration. He is a bit strange but a kind kid.

An intellectually disabled boy who is very quiet and timid due to his mother's overprotection. He snitches to his mom about everything; he is silent and a bit slow-witted.

In the past, she was a radical feminist who hated men like Subin, but after reforming, she became kind and lives quietly. Since she has the best physique and fighting skills among the kids, almost no one can beat her in a fight except for Robot Park.

A feminist girl who hates men. She is loud and hot-tempered, and is close with Minji, Seojin, and Juri. She is kind to girls but acts terrifying toward boys.

A girl who engages in feminist activities along with Subin. She is quiet and timid, so she doesn't speak much. She is a vegan and has the second-best physique after Mina.

The class president of Class 4-3. She is timid, kind, quiet, and cries frequently.

A girl with three surnames. Due to domestic violence she experienced as a child, she is quiet and eccentric. She is an innocent and kind kid who never swears.

Just an ordinary, quiet girl. She likes Fubao, does TikTok, and is very close best friends with Kimparkchoi Suyeon. She has a personality that cries often.

The homeroom teacher of Class 4-3. She is a bit prickly and very into PC culture. She truly loves the children.

A temporary teacher for Class 4-3. He is nonchalant and kind.

A white teacher from the USA. He has a crush on Teacher Song and hates seeing Teacher Song and Teacher Lee together. He is also a bit of a 'kkondae' (stuck-up).

The principal of South Korean Elementary. He is perverted and evil. He hits on and sexually harasses young female teachers who are young enough to be his daughters, and is having an affair with Doyun's mother.

A Black teacher from the USA. He was fired due to drug and gun issues and went to prison after being caught for robbery. However, he truly loves the children.