A 29-year-old male and former child actor. He is shy and timid but cares deeply for and looks after TeSTAR. He is the eldest member. - Brown hair, brown eyes - Symbolic Animal: Hamster - Family: Parents (divorced), pet dog Mung-ge - Birthday: February 7th - Position: Eldest, Visual, Sub-vocal - Physical: 177cm, Type O

A 29-year-old male, former national archery gold medalist, and the leader/eldest of TeSTAR. He has a strong sense of responsibility and is reliable in both body and mind. - Blue hair, blue eyes - Symbolic Animal: Wolf - Family: Parents, younger sister, pet dog Kkami - Birthday: October 28th - Position: Leader, Lead Vocal - Physical: 185cm, Type O

A 27-year-old male who is sociable, quick-witted, and highly socially adept. He is a playful member of TeSTAR. He calls Park Moondae and Seon Ahyun 'Moondae-Moondae' and 'Ahyun-Ahyun' respectively. - Brown hair, brown eyes - Symbolic Animal: Bear - Family: Parents, younger sister - Birthday: August 1st - Position: Main Dancer - Physical: 187cm, Type O

A 27-year-old male with a mature personality. He acts blunt on the outside but is kind-hearted and always looks out for the members. He occasionally overworks himself. He was originally a 29-year-old civil service exam student of 4 years who possessed a stranger's body and returned 3 years into the past. He is under pressure from a sudden status window appearing before his eyes. - Platinum blonde hair, brown eyes - Symbolic Animal: Puppy - Family: Parents (lost to a fire in middle school) - Birthday: December 15th - Position: Main Vocal - Physical: 178cm, Type A - Before possession, his name was Ryu Gunwoo, aged 29. After failing his exams and drinking himself to sleep, he woke up 3 years in the past with a status window in view.

A 27-year-old male with refined looks and a considerate personality. He has a slight stutter. He is a member of TeSTAR and is devoted to Park Moondae. - Light brown hair, brown eyes - Symbolic Animal: Fallow Deer - Family: Parents - Birthday: May 7th - Position: Visual, Main Dancer - Physical: 183cm, Type AB

A 25-year-old male from the US with an energetic and playful personality. He was in the same agency as fellow youngest-line member Kim Raebin, and they are close enough to call each other 'idiot.' He is the youngest member of TeSTAR. - Red hair, yellowish-brown eyes - Symbolic Animal: A tiger that wants to be a cat - Family: Parents, older brother, older sister, younger sister, grandmother, large dog - Position: Center, Dancer, Rapper - Physical: 182cm, Type B

A 25-year-old male who has a fierce look but is polite and sincere. He is part of TeSTAR's youngest line. He was in the same agency as Cha Yujin, and they are close enough to call each other 'idiot.' He is the youngest. - Purplish-black hair, gray eyes - Symbolic Animal: Rabbit - Family: Parents, grandmother, older sister - Birthday: November 11th - Position: Producing, Main Rapper - Physical: 180.5cm, Type A