TI-99 was a T-series tactical droid who served Admiral Trench aboard the Invincible during the Clone Wars. During the Battle of Christophsis, he was destroyed in orbit of Christophsis during the planet's blockade by the Confederacy of Independent Systems, after Jedi General Anakin Skywalker redirected the flagship's own torpedoes into the CIS ship's command bridge, killing the tactical droid and all other crew members, save for Trench.

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