Lumiya

Lumiya was a Force Adept who was trained by Darth Vader. She proclaimed herself Dark Lady of the Sith after Palpatine and Darth Vader died in the Battle of Endor.

Biography
Born on Coruscant as Shira Ellan Colla Brie, was trained as an Imperial Intelligence agent, and was dispatched by Darth Vader to infiltrate the Rebel Alliance. This she accomplished brilliantly, working her way all the way up to Rogue Squadron, where her vivacious beauty and intelligence made her close friends, possibly romantically, with then-member Luke Skywalker. While serving with the Rebels, Brie would work alongside Kyle Katarn, Corwin Shelvay, and Erling Tredway on a mission to D'rinba IV to disable the superlaser of Death Star II. While based on the planet Arbra, Rogue Squadron was detailed to covertly attack an Imperial fleet; during the battle, Skywalker's equipment malfunctioned, and he was unable to determine which of the TIE fighters were Imperial and which were Rebel, forcing him to rely on sensing intent through the Force - which led to the unexpected result of him shooting down Brie. While under a cloud during an investigation of how he shot down a fellow Rogue, Luke discovered that Brie's putative homeworld Shalyvane was in fact background cover for her, and that her true mission had been to discredit Luke with the Rebellion so that he would join Vader.

It was thought that she had perished in her fighter's crash; but unbeknownest to most, Vader had her damaged body nursed back to life and enhanced with cybernetic parts. Then he took her further under his tutelage, instructing her in the ways of the Dark Side in addition to her already fearsome skill set. Knowing his master would not approve of him taking an apprentice, he chose to hide Lumiya in plain sight, presenting her to the Emperor as an Emperor's Hand. While Brie was training on the fearsome Sith planet Ziost, both masters perished in the Battle of Endor, leaving the title of "Sith Lady" to her. It was there, seething with anger and determined to gain revenge, that Lumiya crafted her unique signature weapon: the "lightwhip". It resembled a lightsaber crafted out of a shard of the Kaiburr Crystal and Mandalorian iron, but with the ability to flex and move like a leather whip. On the planet Hardessa, Lumiya would attempt to kidnap Leia Organa Solo, which led to Luke Skywalker tracking her to the planet Kinooine. Initally, Lumiya triumphed over Skywalker and his companions Dani and Kiro. She revealed that the reason for her success was that Skywalker's Jedi training prepared him for energy weapons or solid weapons, but not both.

After being rescued by Kiro, Skywalker constructed a shorter lightsaber, with a synthetic red blade. He confronted Lumiya again and penetrated her cyborg armor, revealing a scarred Shira Brie. Defeated, Lumiya fled in the wake of the Nagai invasion fleet.

She would later lend military support (three Star Destroyers, two frigates, and four corvettes) to the Tof invasion. Following the failure of the Tof invasion, Lumiya plunged her new Sith order into secrecy much as Darth Bane had done over a thousand years ago. Her apprentices included Flint and, later, the Imperial Sovereign Protector Carnor Jax.