R'az

 is a Klingon Defense Force captain who was part of a Klingon Task Force engaged in a battle with an Undine vessel in Bomari System.

Missions involved

 * : In honor of aiding the Klingons in battle with the Undine, R'az informs the player that "...[they] will not destroy you ... today."

Other
R'az's character model seems to be common, as he shares it with others such as K'Tak and Dahar Masters.