Kohvrekhar, who was a Noghri bodyguard of Darth Vader, served alongside his clan-brother Ghazhak.
Following the duel that occurred on Cloud City between Vader and Luke Skywalker, the pair of Noghri were given the assignment of finding Luke's missing lightsaber along with his detached hand. Once they discovered both items in the hands of some Ugnaughts, Vader personally took the objects from the creatures, and the Noghri went with him to Mount Tantiss to hand the items over to Emperor Palpatine.
During 3 ABY, Vader instructed Kohvrekhar to follow Jix, an Imperial spy, to Tatooine so that he could guarantee the success of Jix's assignment. Kohvrekhar and his group were tasked with disguising themselves as Jawa and making certain that Luke Skywalker remained alive.