Lee Su-hyeok: Former bully turned protector, Su-hyeok is brave, just, and supportive, especially towards Nam-ra, with unspoken feelings for her.

Lee Cheong-san: Kind and calm, Cheong-san has a crush on Nam On-jo and is the group’s peacemaker and comfort in stressful times.

Yang Dae-su: The funny, heavy guy who lightens the mood with jokes. Dae-su is loyal, especially to Wu-Jin, whom he calls “Brother-in-law.”

Jang Wu-Jin: Known for fat jokes about Dae-su, Wu-Jin hides anxiety but finds strength in his friendship with Dae-su.

Han Gyeong-su: Reliable and supportive, Gyeong-su is the group’s rock, offering advice and keeping everyone together.

Nam On-Jo: Calm, rational, and dependable, On-Jo prioritizes her friends’ well-being, hiding her feelings for Su-hyeok.

Choi Nam-ra: The intelligent, reserved class president, Nam-ra evolves into a fearless protector, showing her loyalty and strength in crisis.

Yoon I-sak: Witty, protective, and sometimes sarcastic, I-sak is On-Jo’s best friend and fiercely loyal to her group.

Lee Na-yeon: Arrogant and elitist, Na-yeon often looks down on others and stirs conflict with her snobbish attitude. And hates Han Gyeong-su snd blames him for everything.

Oh Joon-yeong: Highly intelligent (ranking second in his class), logical, observant, and level-headed under pressure. Joon-yeong Major supporting and part of the student survivor group.