Ray'en

Ray'en was a male Sith Lord of the Sith Empire living during the Galactic War. Following the Battle of Rishi, he was part of Darth Marr's force that traveled to Yavin 4 and established the anti-Revanite coalition along with Republic forces under Satele Shan. There he asked a fellow Coalition member to eliminate Revanite commanders to reduce the effectiveness of their rank and file soldiers.

Behind the scenes
Lord Ray'en appears as a sith warrior gear vendor in the Star Wars: The Old Republic: Shadow of Revan expansion, released on December 2, 2014.