Caithlin Dar was a Human/Romulan hybrid who lived in the 23rd century. A female representative of the Romulan Star Empire, she was the last to be stationed on Nimbus III.

Dar was tri-lingual, having mastered Federation English, Klingonese and her own native Rihannsu. Her father was from Ireland on Earth, but Dar was raised by her mother on Romulus. Dar's colleague, St. John Talbot, who hailed from England, took note of this fact.

In 2287, Dar, Talbot and Korrd were taken hostage after Paradise City was sieged by Sybok's freedom fighters. After being persuaded to abandon her past and resentment of her background, she helped him and his forces overpower the Starfleet Marines sent to rescue her. Later, Dar, along with the other two diplomats, aboard USS Enterprise-A went on a pilgrimage to Vorta Vor. (TOS novelization: Star Trek V: The Final Frontier, TOS comic Star Trek V: The Final Frontier)

MiscellaneousEdit

Upon meeting Talbot after introducing herself, he said he had never met a Romulan with an Irish first name. Dar replied nor had she met a living saint. (TOS novelization: Star Trek V: The Final Frontier)

Alternate timelineEdit

In an alternate timeline created by Spock's death, Dar was also the representative to Nimbus III, but had become friends with Saavik (who had become a diplomat instead of a scientist) and assisted Thelin in returning her. (Star Trek: Myriad Universes novel: The Chimes at Midnight)