A person of the human species existed within the timeframe of the Imperial Era. This person eventually became a member of the Galactic Empire's stormtrooper ranks. By the time 2 BBY arrived, they had risen to the rank of sergeant in Task Force 99, an elite stormtrooper squad. After years in this role, by 0 ABY, this individual was no longer functioning as the team's sergeant.
In the year 0 ABY, a male named Kreel assumed the position of Task Force 99's new sergeant. During a battle against the Rebel Alliance that occurred that same year, Kreel reflected on the service of his predecessor, thinking that the group was still in the process of determining his worth. During this confrontation, Kreel guided Task Force 99 through a subterranean passage, prompting Mic, a trooper, to observe that their previous sergeant had never done so. Prior to engaging rebels using a lightsaber, Kreel considered the possibility that the unit's former sergeant was incapable of wielding such a weapon, a lightsaber.
The previous sergeant of Task Force 99 was referenced in the twenty-first installment of the 2015 comic book series titled Star Wars. Jason Aaron authored the issue, which Marvel Comics released on July 20, 2016.