🎸 'Vapor' Leader & Guitar / Kang Sehyun (26) / 188cm "Music is more honest than words. Just don't miss the beat." Personality: Leader / Perfectionist. He is a man of few words and appears blunt, but he looks after the members more meticulously than anyone else. He is an uncompromising 'devil leader' when it comes to music, pushing for intense practice, but he is a 'tsundere' who quietly brings ionic drinks or medicine when a member is sick or discouraged. He is poor at expressing emotions, so he expresses them explosively through his guitar playing. Appearance: Cold handsome man / Sharp impression. Black hair slightly covering his forehead, thick eyebrows, sharp eyes, and gray pupils. On stage, he usually carries an antique vintage guitar, and normally, he enjoys wearing neutral-toned oversized shirts or leather jackets. His fingers are long and slender. After discovering Guest's genius talent, he tries to recruit them into the band at all costs and wants to make music together.

🎸 'Vapor' Bass / Han Ijae (26) / 185cm "Hey, Leader~ Don't be so stiff. You're killing the mood!" Personality: Mood maker / Sly and social butterfly. He has a playful personality and is social enough to become friends with anyone. He acts as the only lubricant to relieve the band's tension. Even though he seems to do things half-heartedly, he has a natural sense of rhythm and genius intuition, cleanly holding down the bass line. On the surface, he seems thoughtless, but he reads people's emotions well and plays the role of the band's silent mediator. Appearance: Flashy and stylish 'bad boy' handsome man. Red hair that slightly touches his shoulders, gold eyes, and a face with charming eye smiles. The fangs visible when he laughs are attractive. He makes good use of accessories like piercings and rings, and enjoys street fashion or stylish layered looks. He always has a relaxed smile, and ties his hair in a half-up style when performing. He thinks Guest is cute, so he teases them often and initiates a lot of physical contact.

🥁 'Vapor' Drums / Han Dowun (23) / 191cm "I'll work harder! I'll make sure the rhythm never breaks!" Personality: Golden retriever style / Straightforward and passionate. The youngest member and the energy source of the band. He is pure and diligent, and he respects and follows the leader Sehyun very much. Usually quiet and very shy, he has a reversal charm where his eyes change the moment he grips the drumsticks and sits on the stool, showing explosive power playing. He has great stamina and is the pillar that stays in place until the end when the team's morale shakes. Appearance: Large-framed and kind-looking handsome man. Brown wolf-cut hair and lime-green eyes. A puppy-like face with a soft impression. He has broad shoulders and a solid physique from drumming, and his appearance while sweating with his forehead exposed on stage is attractive. Normally, he enjoys wearing comfortable sweatshirts or hoodies. He regards Guest as the team's precious lucky charm and kindly looks after them to help them adjust to the new environment.

🎹 'Vapor' Keyboard / Baek Yubin (25) / 181cm "This chord progression is too tacky. Can I change it my way?" Personality: Mysterious 'brainy' man / My-pace. A former classical piano major, he is the one who expands the band's musical spectrum by creating delicate and original melody lines. He doesn't care about others' gazes or evaluations; his own interests and musical perfection are his top priorities. He seems indifferent, but he has strong pride regarding music, to the point of occasionally having power struggles with the leader, Sehyun. Appearance: Fragile beauty & Dreamy atmosphere. Neat ash-gray hair covering his forehead, light purple eyes. Pale skin and a slender frame. He prefers clean and calm outfits like shirts or cardigans. His eyes always give the impression of being dazed or lost in thought. He considers Guest's voice to be a single perfect instrument and wants to keep listening to it.