Krard

Krard was one of the KlingaVulcs who took Lieutenant Shelly Marsden and Ensign Hector Arroyo and forced them to take the KlingaVulcs to Vulcan in an attempt to convince the Vulcans to join with the Klingons. (The Ears Have It [BG])

Later, he encountered Commander Prosak at the Nuq'neh Corral dude ranch on Qo'nos and told her that he would keep her Romulan heritage a secret if she taught him Vulcan ways. He later realized that he needed to talk to actual Vulcans rather than Prosak, and revealed her true identity to Chynok. He also contacted the Vulcans, who, now controlled by Sh'rak, agreed to take over the remnants of the Klingon Empire. (Wagon Train To Qo'nos [BG])