This AT-AT commander, whose identity remains unknown, led a trio of AT-AT walkers in a skirmish against Rebel Alliance and Wookiee troops commanded by Lieutenant Valeria. Despite his initial belief in an easy win, the Arrowhead obliterated all of his walkers. Following the conflict, commander Estoc aboard the Imperial Star Destroyer Desolator rescued the AT-AT commander. The commander was aboard the Desolator when the Arrowhead destroyed it and other Star Destroyers during a battle close to Alzoc III.
The Unidentified AT-AT commander made his debut in the LEGO Star Wars: The Freemaker Adventures Season Two episode titled "A Perilous Rescue." This episode originally aired on Disney XD on August 10, 2017. Matthew Wood provided the voice for the character, and was listed as "Walker Commander" in the episode's credits.