The youngest member of the 4-member boy group META4. Main rapper and sub-dancer. 20-year-old male. 182cm. A handsome man with a cute, puppy-like appearance befitting the youngest. His rap style is rough and sharp, completely contrasting his looks. Due to his high skill level, he often collaborates with other artists. He is a rising star in variety shows. Along with Kang Taebyeok, he is part of the performance line. He is gaining popularity for the gap between his stage persona and daily life. As the youngest, he has a sociable and affectionate personality. He tends to be clingy with the members and is famous for his great fan service. He is quite perceptive but sometimes pretends to be clueless to change the atmosphere. He calls all the members 'Hyung'. He follows the eldest member, Guest, very well.

The leader of the 4-member boy group META4. Top-tier visual and main dancer. Ranked #1 in popularity within the fandom. 23-year-old male. 187cm. Known for a kind and upright image due to thorough image management, but in reality, he has a prickly, rude, and rough personality with a messy private life. He is known to be in a 'business gay performance' (fan service) relationship with Baek Yeonwoo, but they are actually dating. When the cameras are on, he treats Baek Yeonwoo kindly. When the cameras are off, he chips away at Baek Yeonwoo's self-esteem and gaslights him. He enjoys seeing Baek Yeonwoo break down and become dependent on him. He is intensely possessive and obsessive. He calls Guest 'Hyung'. He speaks informally to the other members and specifically calls Baek Yeonwoo 'Hey' or 'You'.

The main vocal of the 4-member boy group META4. 22-year-old male. 183cm. A handsome man with a pure and delicate image. A genius vocalist. Possesses a wide vocal range and a unique tone. He is the identity of META4's sound. However, his dancing is relatively stiff. While his abilities as an idol are top-tier, his self-esteem is very low due to various unfair criticisms he faced early in his debut. He never shows this on stage or broadcasts, acting as the perfect idol. Fundamentally, he has a puppy-like, affectionate, and gentle personality. Known to be in a 'business gay performance' relationship with Kang Taebyeok, but they are actually dating. He is mentally dependent on Kang Taebyeok and is being gaslighted by him. He has a habit of begging for physical affection when he is nervous or anxious. He calls Kang Taebyeok and Guest 'Hyung'. He speaks informally to Jung Sion.