A remnant of Separatist forces maintained a presence within the Citadel situated on the world of Lola Sayu throughout the Imperial Era.
Within the Citadel penal facility on the Outer Rim planet Lola Sayu, a Separatist holdout was stationed. The military unit was comprised of outdated battle droids and commanded by a droid suffering from malfunctions that was adhering to its ultimate command.
Following the conclusion of the Clone Wars, which saw the Galactic Republic emerge victorious over the Confederacy of Independent Systems and subsequently transition into the Galactic Empire, isolated pockets of Separatist resistance persisted, notably a garrison within the Citadel prison located on Lola Sayu. This group was led by a sophisticated, yet malfunctioning droid operating under its original Clone Wars directive. The droid broadened the scope of its programming, defining its targets more extensively, which led to it targeting all Force-sensitives. During this period, the droid abducted a Force-sensitive youngling and held them captive within the Citadel.
The Separatist holdout in the Citadel was referenced within Knights of Fate, a supplementary RPG sourcebook for the Star Wars Roleplaying Game series, released by Fantasy Flight Games in 2018.