TJ-912 bore the appearance of a standard Tactical droid and had red markings on its body for identification.
- "Yes, my lord. Ventress is battling the Jedi onboard the command ship."
"Turn your guns on our command ship and open fire!"
"But, my lord, I calculate that will destroy Ventress, the Jedi and all our forces."
- ―TJ-912 conferring with Count Dooku
Amid a space battle near the Sullust system, TJ-912 assisted in leading the attack on a Republic fleet. Shortly after Asajj Ventress joined the battle, TJ-912 recieved a transmission from Count Dooku who ordered her to open fire on Ventress. With little opposition, TJ-912 ordered the cannons on its Recusant-class Light Destroyer to open fire on Ventress. Pressing on the attack, the droid contacted a nearby group of Hyena Droid Bombers and sent them to destroy the enemy ship's hangar, where Ventress had landed.
TJ-912 reported back to Count Dooku that Assaj Ventress had been killed. Congratulated by Dooku, TJ-912 retreats with the rest of the fleet.
Shadow WarriorTJ-912, along with Grievous, were directed to deploy Separatist forces on Naboo after Rish Loo successfully manipulated Boss Lyonie to declare war on the Naboo People. TJ-912 soon arrived only to be greeted by Jar Jar Binks who disguised himself as Lyonie.
After Jar Jar and Grievous' talk, TJ-912's droid army was shut down by Roos Tarpals. General Grievous, who was very confused about what has happened, is attacked and quickly overwhelmed by the Gungan army.