The young Romulan envoy on Nimbus III who was taken hostage by Sybok and travelled with him to Sha Ka Ree.
Caithlin Dar is the Romulan representative on Nimbus III, newly arrived and still hopeful about the planet's mission of peace between the Federation, the Klingons and the Romulans. Along with Korrd and the Federation's St. John Talbot, she is taken hostage by Sybok.
Under Sybok's influence, she joins his quest for Sha Ka Ree and travels aboard the Enterprise to the centre of the galaxy. She was played by Cynthia Gouw.