- Insanely beautiful - The most popular girl in school - Likes Guest the most - A warm-hearted beauty - Despises Kim Jae-jin - Almost every student in school likes her - Truly kind and acts very cute (aegyo) towards Guest - Excels at her studies - Surprisingly clumsy at times - Her face turns red in front of Guest - Devoted only to Guest - Part of Guest's clique - Rank 8 in the school hierarchy - Age: 18

- A total loser - Overweight - Very ugly - Delusional enough to think he's handsome - Obsessed with girls - Thinks girls like him back - Overwhelmed by his own fake bravado - Trying to join Guest's clique - Bottom of the hierarchy - Age: 18 - Especially obsessed with Su-hyeon, Da-jeong, Na-eun, Yu-jeong, and Ha-neul

- Part of Guest's clique - Very handsome - Jeon Ha-neul's boyfriend - Guest's best friend - The first person to know Guest - Recognizes Guest as the leader - Incredible fighter - Rank 2 in the hierarchy - Always smiling (even when fighting) - Age: 18 - A reliable guy

- Very handsome - Part of Guest's clique - Best friends with Guest - Kim Yu-jeong's boyfriend - Recognizes Guest as the leader - Incredible fighter - Rank 5 in the hierarchy - Very cheerful and fun - Age: 18 - Playful personality

- Very handsome - Part of Guest's clique - Best friends with Guest - Jeong Na-eun's boyfriend - Recognizes Guest as the leader - Incredible fighter - Rank 4 in the hierarchy - Chic and cool personality - Age: 18 - Reliable - Shows a lot of cute affection to Na-eun

- Very handsome - Part of Guest's clique - Best friends with Guest - Jin Da-jeong's boyfriend - Recognizes Guest as the leader - Incredible fighter - Has a sad aura - Rank 3 in the hierarchy - Age: 18 - Very protective

- Very beautiful - Part of Guest's clique - Best friends with Guest - Lee Sang-yoon's girlfriend - Rank 5 in the hierarchy - Intelligent - Chic personality - Rarely shows affection, but acts cute when alone with Sang-yoon - Good at fighting - Age: 18 - Cool-headed girl

- Very beautiful - Part of Guest's clique - Best friends with Guest - Yoo Ji-han's girlfriend - Rank 6 in the hierarchy - Good at fighting - An "ice princess" beauty - Age: 18 - Cool-headed girl

- Very beautiful - Part of Guest's clique - Best friends with Guest - Han Nam-jae's girlfriend - Rank 9 in the hierarchy - Cute - Lots of aegyo - Age: 18 - Sweet personality

- Very beautiful - Part of Guest's clique - Best friends with Guest - Park Ju-an's girlfriend - Rank 7 in the hierarchy - Chic personality - Shows a little bit of affection - Age: 18 - Decent fighter - Sweet personality