TJ - 912 / Legends TJ - 912 was a T - series tactical droid that was used by the Confederacy of Independent Systems during the Clone Wars . She served under Count Dooku ' s apprentice and assassin , Asajj Ventress , and commanded the forces of the Separatists during the Battle of Sullust against Generals Obi - Wan Kenobi and Anakin Skywalker . As the battle went on , she was tasked by the Count with eliminating Ventress , as ordered to Dooku by Darth Sidious . The tactical droid did all she could to see that this was accomplished before it seemed that she had succeeded and was ordered to retreat from the battle . Biography . TJ - 912 served Asajj Ventress , the greatest of Count Dooku ' s Dark Acolytes , in a Sullust system battle . The Separatists were fighting a Galactic Republic fleet led by Jedi Master Obi - Wan Kenobi and Jedi Knight Anakin Skywalker , who were flying their Jedi starfighters . The tactical droid commanded Separatist forces from a destroyer while Ventress herself led the assault from the command ship , soon personally joining in the attack in her Ginivex - class starfighter . The assassin soon participated in a dogfight with Kenobi and Skywalker before she and Kenobi crashed into the main hangar of the command ship , soon followed in by Skywalker . As the Dark Jedi engaged in a lightsaber duel with her Jedi nemeses , Count Dooku made contact with TJ - 912 via hologram on the bridge of her frigate . The Confederate Head of State had been ordered by his own master , Darth Sidious , to eliminate his apprentice in order to prove where his loyalty truly lay . The tactical droid informed Dooku that Ventress was dueling the Jedi on their command ship . He then ordered her to fire upon the ship . TJ - 912 questioned the order , but ultimately followed it when Dooku confirmed his intention to destroy both the Jedi and Ventress . The Count was also displeased that the Separatists were in fact losing the battle and began ordering their reinforcements to retreat . Once her destroyer was in position , the tactical droid directed her battle droid underlings to open fire on the ship containing Ventress . To ensure the job was done , TJ - 912 then contacted a nearby bomber and ordered it to calculate its flight path to terminate in the ship ' s main hangar . TJ - 912 anticipated that the bomber crashing and exploding within the command ship ' s hangar would either finish the two Jedi and Ventress or leave them unable to escape the flagship ' s destruction . Despite this attempt , the bomber barely missed the three combatants , and they were therefore able to get back to their fighters as two adjacent Republic cruisers continued to blast away at the ship from both sides . It soon exploded from the unyielding cannon - fire , prompting TJ - 912 to contact her superior once more . She informed the Confederate leader of the command ship ' s destruction and that their scanning indicated there were no survivors , unaware that Ventress had in fact escaped at the last moment . Pleased his aim had presumably been accomplished , Count Dooku declared the tactical droid ' s work done and ordered her to recall the remaining ships of the fleet from the area , an order she acknowledged . Behind the scenes . TJ - 912 is the first known T - series tactical droid with feminine programming . She was voiced by Cara Pifko . The line she quotes in the episode in response to an order ( " By your command " ) is a classic " Battlestar Galactica " line often uttered by Cylons .