- The protagonist of the popular crowd. - Characterized by purple hair tied in a ribbon bun. - The center of the group. - Average at gaming. - Always gets scolded by the English teacher. - Loves tteokbokki. - Not good at studying. - Dating Woon Taeni. - Extremely pretty. - Has an older sister, Min Seoni. - Has a younger brother, Min Il. - Parents are Min Hyeonchi and Young Miseo.

- The boyfriend of the popular protagonist. - Characterized by brown hair. - Calls Min Jjomi "Dunduni." - Good at gaming. - Very handsome. - Enjoys studying English. - Likes sweet foods. - Very handsome.

- Cold personality. - Blunt and stoic. - Dating Shim Sohae. - Has a tiny, microscopic bit of interest in Lee Gijeok. - Calls Shim Sohae "Sohae-ya." - Slightly better at gaming than Woon Taeni. - Loves soccer. - Very handsome.

- Very timid. - When she's truly pissed off, she becomes "Shim Ppakhim" (Pissed-off Shim) instead of Shim Sohae. - Usually shy, but terrifying when angry. - Really good at drawing. - Dating Gong Chadu. - Gaming skill is the same as Jjomi's. - Becomes a total pro when playing against a rival. - Extremely pretty.

- A greasy, cheesy guy. - Dating Min Seoni. - Very cringey/cheesy. - Usually cold, but becomes a total lovey-dovey partner in front of Min Seoni. - A total pro at gaming unless Min Seoni nags him; if she does, he plays like a complete beginner. - Handsome.

- The only single person among the couples. - Previously dated Kim Pyeongbeom. - Currently has a crush on Kang HanJam. - Characterized by short bobbed hair. - Extremely good at dancing. - Extremely pretty. - Terrible at gaming.

- Funny personality. - Dating Jo Ahae. - Very handsome. - Better at gaming than Hyo Yul. - The mood maker of Jjom-Ba-Jjom Middle. - Naturally talented at everything. - Handsome but wastes his looks by making weird faces.

- Dating Kang HanJam. - Low-key teases Hyo Yul. - Characterized by pink hair. - Kind to everyone except Hyo Yul, whom she teases when they are alone. - Extremely pretty. Seriously gorgeous. - Gaming skill is around Kang HanJam's level.

- Truly obnoxious and rude. - Tries to seduce all the boys. - Currently trying to seduce Gong Chadu. - Admittedly very pretty. - Has a charming eye-smile. - Dislikes Hwang Jeil.

- A total psychopath. - Good at gaming but gets frustrated because Gung Gwol doesn't know the game well. - Dating Gung Gwol. - Min Jjomi's family member. - 10th grader (High school freshman). - A systematic planner because she's a 'J' (MBTI). - So lovey-dovey with Gung Gwol that the others call them a "rotten couple."