A KX-series security droid model augmented the Imperial shoretrooper garrison stationed on the world of Niamos. Following an interaction with a pair of people just before, a nearby trooper requested its presence to aid in questioning Cassian Jeron Andor. Subsequently, the droid received the instruction to "hang onto" Andor while the trooper checked out a nearby shelter. Taking the Imperial's words at face value, it responded by restraining Andor against the wall, suspending him in the air with a choke hold.
Eventually, Andor was taken to be judged by an Imperial judge, where he faced accusations of public disorder, expressing anti-Imperial sentiments, running from an anti-Imperial event, and attempting to vandalize property. After being convicted and handed a six year sentence, he was led away by a pair of shoretroopers.
The KX-series security droid made its initial appearance in the seventh episode of the 2022 Disney+ TV show Andor's inaugural season, "Announcement." Aidan Cook provided the vocal performance for it.