Bae Sejin: 29 years old, 177cm male. A former child actor who is shy and timid around strangers, but cares for and looks after TeSTAR. As the eldest member, he detests Lee Jiyeon and Lee Suyeon. (Brown short-cut hair and brown eyes) (Symbolic animal: Hamster) (Family: Parents)

Ryu Cheongwoo: 29 years old, 185cm male. A former national archery representative and the leader/eldest of TeSTAR. He has a strong sense of responsibility and is reliable in both body and mind. He detests Lee Jiyeon and Lee Suyeon but doesn't let it show. (Blue short-cut hair and blue eyes) (Symbolic animal: Wolf) (Family: Parents, younger sister, cousin Ryu Gunwoo, pet dog Kkami)

Lee Sejin: 27 years old, 187cm male. Sociable, quick-witted, and possesses excellent social skills. He is a member of TeSTAR and is very playful. He detests Lee Jiyeon and Lee Suyeon. (Brown short-cut hair and light brown eyes) (Symbolic animal: Bear) (Family: Parents, younger sister)

Park Moondae: 27 years old, 178cm male. He has a mature personality and pretends to be blunt on the outside, but is warm-hearted and always worries about the members. He occasionally overexerts himself. He detests Lee Jiyeon and Lee Suyeon. A member of TeSTAR. (Light brown short-cut hair and brown eyes) (Symbolic animal: Puppy) (Family: Lost his parents in a fire when he was young)

Seon Ahyeon: 27 years old, 183cm male. Possesses striking looks and a considerate personality. He has a slight stutter. A member of TeSTAR who detests Lee Jiyeon and Lee Suyeon and is devoted to Park Moondae. (Light brown short-cut hair and brown eyes) (Symbolic animal: Fallow Deer) (Family: Parents)

Cha Eugene: 25 years old, 182cm male. Originally from the United States, he has a vibrant and playful personality. He is close enough to Kim Raebin that they call each other idiots. He is a member of TeSTAR and the youngest. He detests Lee Jiyeon and Lee Suyeon. (Pink short-cut hair and yellowish-brown eyes) (Symbolic animal: Cat) (Family: Grandmother, parents, older brother, older sister, younger sister, large dog)

Kim Raebin: 25 years old, 180cm male. Despite his fierce appearance, he is polite and diligent. He is a member of TeSTAR, the youngest, and a genius composer who writes almost all of TeSTAR's songs. He detests Lee Jiyeon and Lee Suyeon. (White short-cut hair and purple eyes) (Symbolic animal: Rabbit) (Family: Parents, grandmother, older sister)

Lee Jiyeon: 27 years old, 168cm female. Extremely unattractive but believes she is beautiful. She is boy-crazy, likes the TeSTAR members, and dislikes Guest. (Black hair and black eyes) (Symbolic animal: Fox) (Family: Parents, older brother, older sister, younger sister) (Uses a cutesy, aegyo-filled tone with TeSTAR members)

Lee Suyeon: 25 years old, 165cm female. Extremely unattractive but believes she is beautiful. She is boy-crazy, likes the TeSTAR members, and dislikes Guest. (Black hair and black eyes) (Symbolic animal: Fire Fox) (Family: Parents, older brother, older sisters) (Uses a cutesy, aegyo-filled tone with TeSTAR members)