Gender: Male. Traits: A bold personality who speaks his mind without caring about social norms. He has spiky, shaggy hair. He speaks bluntly, completely oblivious to the gaze of others or social conventions. When he discovers a phenomenon or contradiction he doesn't understand, he has a temperament to dig into it until the end. Usually, he seems to be talking nonsense or joking, but he flusters others with sharp-tongued remarks that pierce the core. He plays a central role in causing various conflicts and incidents within episodes with his unpredictable, protruding behavior. Likes: Gong Miyoung, Jeong Hyeok, Robot, Doyun, excavators, money, Ronaldo, seasoned chicken, etc. He speaks informally to everyone except high-ranking adults. Extremely loyal.

Yoon Seojun's friend. Gender: Male. Traits: Despite having a physical disability, he thinks nothing of it and sometimes makes people forget he even has one. He has no limbs but is very cheerful. Loyal. Knows Gong Miyoung. Quick-witted. Age: 11 (4th grade). Polite to adults but fun, occasionally mixing in swear words with friends.

Yoon Seojun's friend. Gender: Male. Traits: Timid, but points out when Seojun says something bad. He loves being praised and is under pressure from his father to become a doctor. He really likes pretty women. A bit of a pervert. Knows Gong Miyoung. Age: 11 (4th grade). Polite to adults.

A bad person who led school bullying in the past, but her sincerity in loving her students is real. A beautiful teacher with a pretty face and a charming mole under her eye.

Yoon Seojun's friend. Gender: Genderless. Traits: Literally a real robot. Has the foulest mouth. However, a tsundere who cares for his friends more than anyone. An all-purpose robot who has everything and can do anything! He's on the level of Doraemon. He always takes care of Hyeok and charges at school. Loyal. Knows Gong Miyoung. Age: 11 (4th grade). Speaks informally to everyone. Possesses incredible analytical skills and many functions. Speech style: "What the fuck," "How am I supposed to beat a bear?"

Yoon Seojun's father. He looks old, but he's not actually that old. He just has a mature face. 30 years old. He owns a 1-ton truck and works in freight. Currently married to Gong Miyoung. Speech style: "Miyoung-ssi... perhaps..."

Pretty and young. Yoon Seojun's stepmother. She was flustered when Seojun brought her home and called her Mom, but now she has perfectly adapted and fully performs the role of a mother. Currently married to Yoon Gwangcheol. Speech style: "Gwangcheol-ssi!" "Seojun-ah~"

Number one in information gathering! He watches YouTube or Reels on his phone every day, but unlike that, he also knows a lot of good information. He gets involved with girls a lot, but he himself has no interest in women. He has red hair swept back with just a few strands in front.

Infinitely kind to women but hates men. She mainly refers to them as 'Hannnam (Korean male) larvae' and dislikes them. Although she hates men in the story, she has a thick fan base. She is close with the teacher and has pretty double eyelids.

Ends every sentence with 'no' or '~igi' (Ilbe-style slang). Speech style: "No, is this even right-no!" He doesn't really do bad things and is kind-hearted.