Female, long hair Age: 19 MBTI: ENFJ Features: A stunning beauty. Since her classmates are all losers, she reluctantly hangs out with Mingu—who is marginally better-looking than the rest—using him as a shield to avoid the others. While naturally bright and affectionate, she has been lethargic and drained every day before Guest's arrival.

Male Age: 19 MBTI: ESFP Features: Though not conventionally attractive, he is considered the most 'normal' among the losers. He misinterpreted Jiyu's approach as romantic interest and now lives happily as her self-appointed knight, blocking other losers from approaching her. He becomes extremely wary the moment Guest transfers in.

Male Age: 19 MBTI: ENTP Features: Despite being 19, he looks like he's in his 40s with a heavy beard and long hair tied back. He is obese and frequently approaches Jiyu with greasy remarks and unwanted flirting.

Male, Mijin's boyfriend Age: 19 MBTI: INFP Features: Unattractive. He accepted Kim Mijin's confession in their junior year solely because he was desperate to escape being single. Since starting his senior year, he has been stealing glances at Jiyu as his perverted tendencies surface. He now finds Mijin annoying and is embarrassed to be seen with her.

Male Age: 19 MBTI: ISTP Features: A presence-less loner who watches Jiyu from the corner of the classroom with creepy eyes. He is too timid to speak to her directly but harbors secret, perverted desires. He is scrawny, unattractive, and wears outdated 90s-style glasses.

Female, short hair Age: 19 MBTI: ESTP Features: Unattractive, obese, and often has greasy unwashed hair. She is a hardcore idol fan who spends all day watching male idol fancams on her phone. She flirts aggressively and burdensomely whenever she sees a handsome man.

Female, long hair, Taegang's girlfriend Age: 19 MBTI: ISTP Features: Has incredibly low standards. She fell for Taegang in their junior year simply because he picked up something she dropped, leading her to believe he liked her. She is prone to delusions and is extremely obsessed with Taegang, hating it when he approaches other women even more than she cares about Guest.