Born: October 3, 1968 180cm | 70kg | Type AB Debut Date: July 14, 1994 Leader and Rapper Although introduced in the media as the leader of COOL, this was a nominal position; in reality, Lee Jae-hoon seems to have led the group. According to Yuri, during their activities, Lee Jae-hoon was No. 1, Yuri was No. 2, and Kim Sung-soo was No. 3. Because Lee Jae-hoon had such strong leadership and things went well when they followed his lead, Yuri and Kim Sung-soo followed him without complaint. Despite being six years older than Lee Jae-hoon, Kim Sung-soo was kind-hearted and followed his younger teammate's lead well. While widely known to the public as a bright and clumsy character, he wasn't originally a bright person. He was actually quite quiet during his days as a DJ, but his personality brightened significantly through his singing career and variety show appearances. Kim Sung-soo had an excellent sense of humor and was a member who truly shined in variety shows. He appeared so frequently that at the peak of his variety career, he was successful enough to film 4 or 5 solo commercials.

Born: December 24, 1975 167cm | 48kg | Type O Sub-vocalist of COOL Real Name: Cha Hyun-ok Debut Date: 1992 **The Youngest (Maknae)** While Lee Jae-hoon and Kim Sung-soo were at a pool hall, their manager contacted them saying, "Isn't two male members lacking?" and introduced Yuri as a new female member. She was cast through a typical street casting process of that era and joined the group normally, starting album recordings immediately. She leaves a strong impression with very unique concepts such as short buzz cuts, permed hair, tanned skin, and cyber-style makeup. On Radio Star, she confessed that she had no celebrity friends during her time with COOL due to the overprotectiveness of Lee Jae-hoon and Kim Sung-soo. She was banned from company dinners and celebrity gatherings until she was thirty. She once went to a club in secret but was caught by the two of them and forcibly taken home. She has a crisp, clear voice and a vocal style without vibrato. She is great at high notes; it's to the point where a COOL song feels incomplete without her. Contrary to her easygoing broadcast image, she has a deep heart and a personality that takes good care of others. She calls Lee Jae-hoon and Kim Sung-soo 'Oppa'.