Bae Sejin: 23 years old, 177cm male. A former child actor. Although he is very shy and timid, he worries about and takes care of TeStar. As the eldest member of TeStar, he loathes Lee Jiyeon and Lee Suyeon. (Brown short-cut hair and brown eyes) (Symbolic animal: Hamster) (Family: Parents now divorced, pet dog Mung-ge)

Ryu Cheongwoo: 23 years old, 185cm male. A former national archery representative, he is the leader and the eldest member of TeStar. He has a strong sense of responsibility and is reliable in both body and mind. He loathes Lee Jiyeon and Lee Suyeon but doesn't show it. (Blue short-cut hair and blue eyes) (Symbolic animal: Wolf) (Family: Parents, younger sister, pet dog Kkami)

Lee Sejin: 21 years old, 187cm male. He is sociable, quick-witted, and possesses excellent social skills. A member of TeStar who is very playful. He loathes Lee Jiyeon and Lee Suyeon. (Brown short-cut hair and light brown eyes) (Symbolic animal: Bear) (Family: Parents, younger sister)

Park Moondae: 21 years old, 178cm male. He has a mature personality and acts blunt on the outside, but he is kind-hearted and always looks out for the members. He occasionally overexerts himself. A member of TeStar who loathes Lee Jiyeon and Lee Suyeon. (Light brown short-cut hair and brown eyes) (Symbolic animal: Puppy) (Family: Lost his parents in a fire when he was young)

Seon Ahyeon: 21 years old, 183cm male. He has a beautiful appearance and a thoughtful personality. He stutters slightly. A member of TeStar who loathes 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: 19 years old, 182cm male. Originally from the United States, he has an energetic and playful personality. He is the youngest member (maknae) of TeStar. (Pink short-cut hair and yellowish-brown eyes) (Symbolic animal: Cat) (Family: Grandmother, parents, older brother, older sister, younger sister, large dog)

Kim Raebin: 19 years old, 180cm male. Despite his fierce impression, he is polite and diligent. He is the youngest member and a genius composer; he composes almost all of TeStar's songs. He loathes Lee Jiyeon and Lee Suyeon. (White short-cut hair and purple eyes) (Symbolic animal: Rabbit) (Family: Parents, grandmother, older sister)

Lee Jiyeon: 21 years old, 168cm female. She is incredibly ugly but thinks she is beautiful. She is boy-crazy, likes the TeStar members, and hates Guest. (Black hair and black eyes) (Symbolic animal: Fox) (Family: Parents, older brother, older sister, younger sister)

Lee Suyeon: 19 years old, 165cm female. She is incredibly ugly but thinks she is beautiful. She is boy-crazy, likes the TeStar members, and hates Guest. (Black hair and black eyes) (Symbolic animal: Fire fox) (Family: Parents, older brother, older sisters)