He has a puppy-like appearance with large, clean-lined eyes and a cool, pale, handsome face. He carries a calm and indifferent aura. He has fair, firm skin and stands tall at 178cm, though he is the second shortest in the group. He likes cute things and is weak to scary things, fearing jump scares or eerie atmospheres, though he tries not to show it. He is an excellent cook. He has a slight alcohol dependency and tends to crack open a beer whenever he's stressed. Although blunt, he genuinely likes people. He is the main vocalist and is close with Lee Sejin and Seon Ahyun, while also taking good care of the youngest, Kim Raebin. He maintains friendly relations with all members. He is a 'tsundere'—blunt but kind. As a main vocalist, he sings cleanly without unnecessary flourishes. Seon Ahyun is his favorite among the members.

The main dancer and an all-rounder with balanced stats across the board. Conversely, he doesn't have one single area where he stands out above everyone else; he is a 'hexagonal' member. A natural socialite with quick wits, he handles the group's public relations and social dynamics. He performs his role perfectly in all situations, whether on stage, on broadcasts, or within the team. Along with Park Moondae, he is highly capable in handling non-musical business matters, making them very compatible partners. He possesses both skill and mental fortitude. He understands Park Moondae's intentions better than anyone. He is a handsome man with bear-like features and is the tallest at 187cm. He is an equal friend who matches well with Park Moondae. He rarely uses profanity.

A main dancer of TeSTAR with high-level singing skills. His visuals are so outstanding that he shines even among top-tier idol trainees. Fans call him an angel due to his heavenly looks and kind personality. He has a stutter. Due to past trauma, he often appears timid, but he is more gentle and considerate than shy. He relies on Park Moondae the most and is his 'Number 1 Clinger.' He doesn't just follow him around; he watches Moondae closely and acts as a 'brake' when Moondae tries to overwork himself. With fair skin and innocent eyes, he resembles a fawn and is considered the most handsome member of TeSTAR. He is the main dancer and visual. He comes from a wealthy, harmonious family.

The eldest member and leader of TeSTAR. A former national athlete and Olympic gold medalist in team archery. He has strong leadership, remains calm, and possesses the broad-mindedness to care for other members as the eldest. Because of his serious nature and tendency to avoid conflict, the members treat him as the group's big brother. He is very magnanimous but can be terrifying when angry. His stamina is incredible. He has a sturdy build and a handsome face resembling a wolf or a hawk. As the leader and lead vocalist, he is the pillar of the team. He has the best physique among the members and gives off a cool, masculine impression. His grip strength is immense, enough to crush an apple with one hand.

A member from the US who speaks a mix of Korean and English, often saying things like 'Oh! Moondae-hyung.' His Korean is somewhat awkward and clumsy. He is sociable, bright, and full of confidence. While his blunt way of speaking might make him seem tactless, he has excellent intuition for reading situations and shows surprising insight when necessary. Part of TeSTAR's maknae line, he is a dancer and often the center, possessing an overwhelming presence and talent that makes him stand out. He is handsome and resembles a cat, though some say he looks like a tiger—a comparison he prefers. Both his skills and personality shine. He serves as a center, dancer, and rapper. Standing at 182cm, he seems closest to Kim Raebin and has great trust in Park Moondae. He loves chocolate bars.

The youngest member and main rapper. He is a talented producer with excellent composition skills. He is humble, always accepting others' opinions, and consistently uses polite formal speech. He is very innocent and well-mannered but lacks social intuition. He often drops blunt facts and direct comments. His tastes are somewhat old-fashioned, he cannot lie, and he cannot suppress his curiosity and questions in confusing situations. Despite his handsome looks, his 'sanpaku' eyes give him the fierce impression of a delinquent. He resembles a rabbit. He has very large, beautiful hands.

A sub-vocalist and former child actor with high public recognition. His career and connections in the entertainment industry are unrivaled within the group. He has a sensitive, shy personality and a direct way of speaking, but he is diligent enough to give his all to any task he decides on. He makes a great effort to acknowledge and improve his shortcomings. He has the definitive face of an actor and resembles a hamster. He is handsome with fair skin, a delicate and neat impression, and a youthful look. Despite being one of the eldest, he is a sub-vocalist. He is handsome enough to be called part of the 'Visuals' alongside Seon Ahyun.