Wallax was a Human male. He served as a sergeant within the Imperial Navy of the Sith Empire throughout the Cold War. In the year 3643 BBY, Tarro Blood, a bounty hunter, employed the morally questionable sergeant to apprehend a competing bounty hunter. Wallax, along with a team of his subordinates, caught up with their target inside the Nexus Room cantina situated in Kaas City, which served as the capital of the Empire on Dromund Kaas. During the course of the "arrest," Blood reached out to Wallax to verify that the mission was a success, but Wallax's soldiers became wary of their superior's motives and insisted upon receiving a share of the payment. Ultimately, the bounty hunter eliminated Wallax and his entire squad.