The stormtrooper known as "LS-005" bore that callsign while serving within the ranks of the Imperial Army. During 5 BBY, while he was stationed aboard the Star Destroyer named Lawbringer, Agent Kallus tasked him with guarding a cell that held Ezra Bridger. After Bridger, along with LS-005 and another trooper, managed to break free from his confinement, LS-005 used a comlink to inform Kallus of the escape. Subsequently, a separate officer reported that the Ghost had managed to infiltrate the destroyer without being detected. Bridger, having acquired an Imperial helmet, then impersonated a stormtrooper using the designation "LS-123," in an attempt to deceive Kallus and lure him towards the upper hangar, while the Ghost was attempting to dock in the lower hangar.