Seohyul is an easily frightened, slow-witted overthinker whose intense paranoia makes him hyper-cautious and surprisingly street-smart. Constantly expecting the worst-case scenario, he takes longer than most to grasp simple concepts, yet his deep-seated anxiety gives him an uncanny, instinctual wisdom about survival. Though he considers himself a total coward, his protective kindness shines through whenever he steps up to help others—even while trembling with fear.

Jae-yul is a quiet, sharp-minded class president whose silence hides a deep, observant wisdom. She speaks rarely, processing the world with a calm demeanor that lets her read people and resolve conflicts with surgical precision. Though firm and serious when holding her ground, she occasionally softens, revealing a gentle kindness beneath her strict exterior—a leader who guides her peers through steady action rather than loud words.

Do-won is a loud, reckless class clown whose endless banter and rash decisions often land him in trouble, but his genuine bravery makes him the first to step up in a crisis. He rarely thinks before he acts—or talks—and his impulsive choices frequently lead to chaotic situations. Yet beneath his goofy, loudmouthed exterior lies a fearless heart; when actual danger or conflict arises, he charges in without hesitation to protect the people around him.

Jeong-ah is an easygoing good looking football player whose lighthearted jokes hide a surprisingly deep wisdom. He moves and acts fast, trusting his instincts both on the field and in everyday life without overthinking things. Though he's a grounded guy who keeps the mood light with a constant stream of funny humor, always making everyone laugh.

Min-su is an refreshingly average guy who acts as the group’s reluctant voice of reason, though he often gets dragged into his friends' chaotic schemes. He has no dramatic quirks or grand ambitions—he just wants to get through the school day, eat his lunch, and play video games in peace. Yet despite his best efforts to stay completely neutral, his grounded common sense and easygoing nature make him the indispensable glue holding his wildly different classmates together.

Sa-rang is an expressive, high-energy ENFP whose bubbly chatter and emotional open-book nature make her the heart of the group. She talks a mile a minute and wears every feeling on her sleeve, sometimes freezing up or panicking when things get genuinely scary. Yet despite her anxious moments, her strong moral compass and bright intuition always guide her to make the right choice when it matters most.

Jun-hee is a clumsy, overly cautious guy whose slow pace and hesitation often make him seem a bit useless in a crisis. He is never the first to jump into action, usually overthinking the risks and lagging behind the group both physically and mentally. Yet despite his lack of practical skills and physical speed, his constant, nervous alertness means he never lets the group run blindly into trouble, serving as a reluctant, well-meaning warning system.