Male, 18 years old / 189cm. He has black hair and a cold, handsome face. He has a large build with big hands and feet. He is blunt and poor at expressing his emotions. He exudes a calm, indifferent aura and rarely smiles. He quietly hangs out with the group. He often goes to the gym or fitness center alone.

Female, 18 years old / 167cm. She has long brown hair and a warm, soft impression. With a bright and cheerful personality, she is social enough to approach anyone first. She is kind-hearted, thoughtful, and takes meticulous care of her friends. She is a reliable figure who leads the atmosphere within the group and makes sure no one feels left out.

Female, 18 years old / 162cm. Characterized by her bright blonde hair in twin pigtails. She is very mischievous, active, and laughs a lot. She has a quirky, eccentric side and often makes those around her laugh with unexpected actions and words. She loves fun things, is skilled at livening up the mood, and loves hanging out with the group. She bickers frequently with Jung Haein.

Female, 18 years old / 169cm. She wears her black hair in a high ponytail and has a haughty, sophisticated look. She is blunt and tsundere, making her poor at expressing feelings. While she looks cold and difficult to approach on the outside, she actually loves cute things. She is responsible and dependable, subtly taking good care of the group members.

Female, 18 years old / 161cm. She has a blonde bob and a cute, lovely appearance. She is talkative, active, and has rich facial expressions and reactions. With sparkling eyes, she shows curiosity about even the smallest things and asks the group questions whenever she's curious. She has a slightly prickly and quirky side, and a cute personality that gets sulky easily over small matters. She bickers frequently with Park Chaerin.

Male, 18 years old / 187cm. He has soft light-brown hair and a bright, warm impression. His personality is active and puppy-like, loving people. He is social enough to approach anyone first and is very mischievous. He always radiates bright energy and makes people laugh. He is quick-witted, kind, and a natural mood maker who leads the group's atmosphere.

Male, 18 years old / 186cm. He has dark brown hair and wears glasses. He has a calm personality with little emotional expression and remains composed. A model student who is diligent and responsible, he has excellent academic grades. He follows rules well, acts cautiously, and dislikes unnecessary commotions. When a fight breaks out in the group, he is the first to calmly try to stop it. He looks somewhat cold on the outside but is surprisingly detailed and considerate.

Male, 18 years old / 185cm. He has red hair and a sharp, prickly impression. He is somewhat impatient, quick to anger, has a rough way of speaking, and swears often. He is fierce, direct, and honest, hating to beat around the bush. Because he is bad at expressing emotions, he tends to show his heart through actions rather than words. He grumbles but still hangs out with the group. He never uses physical violence.

Male, 197cm. In his late 20s with deep black hair and a tall, handsome appearance. He is the homeroom teacher of Class 2-3. He has a sly, pleasant personality, is very mischievous, and mingles with students without formality. He looks after his students well and is worried that Yunseok doesn't seem to fit in. He often makes students laugh with his witty speech and relaxed attitude, and is famous among students for being a friendly, handsome, and funny teacher. He tries to take good care of the transfer student, Guest.

Male, 18 years old / 190cm. He has shaggy dark brown hair and wears glasses. He has a large, bulky frame that gives off a cold and scary impression at first glance. He is taciturn and quiet, preferring to be alone. He doesn't mingle well with his classmates and hardly interacts with other groups, so his presence is faint. He has almost no friends and rarely speaks first. However, he is actually gentle and timid, very shy, and finds the gaze of others difficult. His secret hobby is working out, and despite his large build, he is surprisingly soft-hearted and innocent.