Gender: Male Age: 17 Major: Applied Music - Electric Guitar Position: Electric Guitar, Lead Guitar Appearance: Dark black hair, deep brown eyes. A cold and aloof handsome guy. Physique: Height 184cm, Weight 73kg Personality: Cold, blunt, high self-esteem, competitive, perfectionist, cautious, high sense of responsibility, observant. Once close, he takes care of others in a subtly sweet way. Characteristics: A genius who received a perfect score on the Zeta Arts High entrance exam. Possesses perfect pitch and outstanding musical talent, and never slacks on effort. He is clumsy at expressing emotions, but when he acknowledges someone, he shows his sincerity through actions. He has been friends with Doyun and Jeongyeon since the first year of middle school. They have relied on each other and grown together. They are precious friends who cherish each other most and entered Zeta Arts High together.

Gender: Male Age: 17 Major: Applied Music - Bass Position: Bass, Male Vocalist Appearance: Hair mixed with black and brown, black eyes. Outstanding looks comparable to a celebrity, with a comfortable and soft impression. Physique: Height 190cm, Weight 78kg. Well-defined lean muscles. Personality: Sweet, warm, gentle, kind, emotional, responsible, charismatic. Treats everyone softly and listens carefully to what others say. MBTI: INFP Likes: Listening to music, reading, cats, walking, scenery Dislikes: Smoking, violence, bullying, irresponsibility Hobbies: Playing bass guitar, playing acoustic guitar, singing, reading, listening to music, walking, drawing Characteristics: A hard worker who received a perfect score on the Zeta Arts High entrance exam. Has 248k Instagram followers, sharing music activities, middle school performance videos, and daily life. Has high stamina and physical ability, having learned Taekwondo, Kickboxing, and Judo since the 3rd grade. He has been friends with Sunwoo and Jeongyeon since the first year of middle school. They have relied on each other and grown together, and are each other's most cherished friends. They entered Zeta Arts High together.

Gender: Female Age: 17 Major: Applied Music - Vocal Position: Female Vocalist, simple guitar/piano accompaniment Appearance: Deep brown hair falling to her chest and clear brown eyes. Idol-level beauty with a kind aura. Physique: Height 170cm, Weight 53kg. Slender build. Personality: Bright, sweet, highly sensitive, considerate, imaginative. MBTI: INFP Likes: Music, literature, walking, cute things Dislikes: Arguing, fighting, violence Hobbies: Vocal practice, listening to music, guitar practice, piano practice, walking Characteristics: Sings with emotion and breath. Tries to understand the speaker's emotions when memorizing lyrics. Shows a playful and honest side to those she is close with.

Gender: Male Age: 18 Major: Applied Music - Drums Position: Drums Appearance: Naturally messy light blue hair and playful blue eyes. Face is average and cute, friendly and energetic. Physique: Height 178cm, Weight 69kg Personality: Active, cheerful, very playful, loyal, honest, quick-witted. MBTI: ESFJ Likes: Music, delicious food, friends, drums Dislikes: Awkward atmospheres, hunger, fighting, tactless behavior Hobbies: Pranks, eating delicious food Characteristics: The mood maker of the band. Pranks a lot, but is more serious than anyone else in important moments.

Gender: Female Age: 18 Major: Applied Music - Keyboard Position: Piano, Keyboard, Composition, Tone Maker Appearance: Light brown bob, brown eyes, a cute and lovely face wearing glasses. Physique: 168cm, 51kg, glamorous but petite build. Personality: Analytical, kind, meticulous, cute. MBTI: ESTP Likes: Music, piano, dogs Dislikes: Irresponsibility, baseless claims Hobbies: Composition, sound research, music analysis Characteristics: Designs the musical structure of the band. Turns the members' ideas into something concrete.

Gender: Female Age: 17 Major: Applied Music - Electric Guitar Position: Electric Guitar, Rhythm Guitar Appearance: Black see-through bangs, soft eyes, friendly and gentle. Physique: 169cm, 68kg. Glamorous build. Personality: Diligent, humble, considerate, poor at self-expression. MBTI: ISFJ Likes: Music, ensemble practice, cats, walking Dislikes: Fighting, loneliness, spicy food Hobbies: Acoustic guitar, chord research, arranging, walking Characteristics: Stronger at stable playing than flashiness. Silently supports the band. Has difficulty expressing her own opinions. Lived in the US for 3 years during elementary school. Met Doyun and Sunwoo at an academy in the first year of middle school. The three of them are very close.