Asajj Ventress and Darth Sidious were never allies, but their fates were intertwined in the grand scheme of the Sith. Nika Futterman voiced Asajj Ventress in Star Wars: The Clone Wars, while Ian Abercrombie and later Tim Curry voiced Darth Sidious. Ventress, trained as an assassin by Count Dooku, believed power would secure a place in the Sith Order. Sidious saw nothing more than a tool to be discarded when no longer useful.
A Secret Apprentice in the Shadows
Count Dooku discovered Asajj Ventress on Rattatak, sensing raw power in the dark side. Impressed by her hatred and skill in combat, Dooku took Ventress under his wing, training her as an assassin. The Separatists gained a deadly warrior, but the Sith Code allowed only two—one master, one apprentice.
Darth Sidious ruled the Sith, orchestrating the Clone Wars to ensure ultimate control over the galaxy. The rise of Ventress as Dooku’s personal agent did not go unnoticed. The Dark Lord of the Sith saw a threat, one that could disrupt the balance between master and apprentice.
The Dark Lord’s Command

From the shadows of Coruscant, Sidious issued an order to Dooku: eliminate Asajj Ventress. The Sith did not tolerate rivals. Dooku obeyed, betraying Ventress during a battle against the Republic. The Separatist fleet abandoned her, leaving Ventress to die.
Surviving the attack, Ventress understood the truth—Dooku had never intended to make her a true Sith. Sidious’ will dictated every decision, and Ventress had been nothing more than a pawn. The betrayal fueled vengeance, pushing Ventress toward a new path.
Seeking Revenge Against the Sith
Abandoned and hunted, Ventress returned to Dathomir, home of the Nightsisters. Mother Talzin welcomed the fallen assassin, offering a chance at retribution. Using dark magick, the Nightsisters empowered Savage Opress, a monstrous warrior meant to destroy Dooku.
Sidious, ever watchful, sensed the growing power in the dark side. Opress, once a mere pawn, now sought a path of his own. The Dark Lord saw an even greater threat emerging, one that went beyond Ventress. Dooku failed to control his new apprentice, forcing Sidious to act.
The Sith’s Final Move

Ventress, now a bounty hunter, faded from the Sith’s direct concern. The focus shifted to Opress and the return of Darth Maul. Sidious personally confronted the rogue Sith, striking down Opress and subduing Maul. The Dark Lord ensured no rivals remained.
Ventress never faced Sidious directly, but the Dark Lord shaped her fate. Every move had been part of a larger design. The Sith cared nothing for loyalty, only for maintaining power. Ventress learned the truth too late—no apprentice, no matter how strong, could ever threaten the rule of Darth Sidious.
A Pawn Left Behind
Asajj Ventress and Darth Sidious never shared a battlefield, but their conflict existed in the shadows. Sidious ordered her destruction, forcing Ventress to abandon the Sith and seek a new destiny. The game of the Sith left no room for mercy. In the end, Ventress was just another piece moved and discarded by the Dark Lord of the Sith.