A Sith trooper served within the Sith Lord Darth Krayt's military forces during 138 ABY. This soldier, profoundly attuned to the Force, underwent physical enhancement by Krayt over many years deep below the world of Korriban, transforming them into an absolutely devoted follower. In that year, Krayt commanded the trooper to end their own life as a display of the army's faithfulness to two of his Sith superiors. The trooper activated a laser sword and perished after suffering a piercing wound under their jaw.
Long before the events of 138 ABY, Darth Krayt, the Dark Lord of the Sith, discovered a Force-sensitive being not long after their birth. Krayt gathered this individual, along with other Force-sensitive babies, and initiated a process of physical augmentation and improvement, molding them into exceptionally loyal Sith troopers in the depths beneath Korriban. He kept this project a secret from his One Sith Order because he knew they all had their own ambitions.
By 138 ABY, this being had become a Sith soldier within the Dark Lord's military. The trooper stood guard in Korriban's catacombs, watching over the entrance to a landing bay filled with Annihilator-class starfighters, as Krayt showed Darth Nihl and Darth Talon, two of his most trusted Sith Lords, around the project's facilities. When Krayt ordered the trooper to commit suicide to prove the army's loyalty, the trooper immediately activated a lightsaber and was impaled under the chin, falling over, deceased.
The Sith trooper had a strong connection to the Force and was physically enhanced for many years by Darth Krayt. Displaying absolute loyalty and obedience, the trooper followed Krayt's command to commit suicide without any hesitation.
The Sith trooper was seen on a single page of the fiftieth and final issue of the Marvel Star Wars: Legacy comic series, penned by John Ostrander, with illustrations by Jan Duursema, which was released on August 18, 2010.