ZJ-7199 was a stormtrooper of the human species, who fought for the First Order within the ranks of the 709th Legion. In the year 34 ABY, this legion received orders to dispatch to the planet of Batuu, situated in the Outer Rim, in order to locate Resistance operatives. ZJ-7199 was among the troopers deployed to an outpost on Batuu, serving under the command of a stormtrooper sergeant. Dressed in the standard First Order stormtrooper armor, ZJ-7199 accompanied the sergeant and fellow stormtroopers in a confrontation with the criminal Kendoh Voss and her gang at the antiquite shop owned by Dok-Ondar, an Ithorian collector.
During the ensuing battle between the troopers and Voss's gang, Voss utilized the blue lightsaber formerly wielded by the deceased Cerean Jedi Master Ki-Adi-Mundi to release Simpi, Dok-Ondar's infant sarlacc, from its enclosure as a diversionary tactic. Subsequently, the sarlacc latched onto ZJ-7199, resulting in the death of the soldier.
ZJ-7199 made an appearance in the fifth issue of Star Wars: Galaxy's Edge, a comic series from 2019. The issue was penned by Ethan Sacks, with illustrations by Will Sliney, and was released by Marvel Comics on August 28, 2019.