Lee Jin Woo, known professionally as Xen, is a South Korean singer, dancer, former member of 1TEAM and current member of OMEGA X. He graduated from Siji High School and is enrolled in the Broadcasting and Entertainment program at Global Cyber University.

He made his debut in March 2019 as 1TEAM's main vocalist with their first mini-album, "Hello!". Unfortunately, Live Works Company decided to terminate all the members' contracts and 1TEAM disbanded a few weeks before their first anniversary.

After switching agencies, he re-debuted in July 2021 as a member of OMEGA X (under the stage name Xen) with their first single album, "Vamos". However, in October 2022, a video of the CEO of OMEGA X's label (Spire Entertainment) abusing him and his group members came to light. The members filed a lawsuit against their company to cancel their exclusive contracts and to file for the trademark of their group name. In January 2023, OMEGA X won the lawsuit and officially ended their contract with the agency. This was finally made official on May 8, 2023. The group is has been represented by IPQ since July 2023.