Pongsapak Udompoch, nicknamed Santa. Previously an actor under Studio Wabi Sabi, he continued his acting career under Thai television production agent GMMTV in April 2024. He then gained widespread recognition for his role as Gun in the 2024 series Perfect 10 Liners. Later, in December 2024, he became a member of the newly debuted T-pop boy band JASP.ER under the Thai music label Riser Music. Before debuting in the group, he had been a K-pop trainee in South Korea for six months, participating in the 2023 survival show Fantasy Boys. Aside from being an artist, he established a clothing brand named "S-TRIX CLUB" in June 2025.