Jun-ho 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.

Jeong-ah is an quick-witted, easygoing football player whose lighthearted jokes and sharp honesty hide a surprisingly deep wisdom. Though he's a grounded guy who keeps the mood light with a constant stream of humor, his straight-shooting honesty and practical insights make him the go-to person when his friends need quick, reliable advice.

Jae-hee 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.

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.

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.

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.