Lorth Needa was a human fleet officer in the Imperial Navy during the Galactic Civil War. He served as captain of the Imperial I-class Star Destroyer Avenger by Fleet Admiral Kendal Ozzel and assigned to Darth Vader's Death Squadron, often being tasked with following up on certain leads regarding the location of the Rebel Alliance's hidden headquarters. Needa served as one of Ozzel's advisors, earning him the distrust of both Vader and Emperor Palpatine.
In the aftermath of the Battle of Hoth, where General Maximilian Veers's assault on Echo Base forced the Rebels into fleeing, Needa and the Avenger were charged with capturing Han Solo's YT-1300 light freighter, the Millennium Falcon, and her crew. The Falcon outran the pursuing Star Destroyers and hid within the Hoth asteroid field, but the Avenger plunged into the field, intent on completing its assignment. The search proved to be hazardous as the warship sustained damage, and its gunners were forced to fire on the asteroids rather than remain alert for the elusive freighter. Nevertheless, when the Falcon emerged from the maelstrom, the Avenger was right behind the freighter. Before Needa could detain the craft, Solo charged the Avenger and landed on a blind spot on the aft of the destroyer's conning tower; as a result, the destroyer's sensors could not find the vessel.