- "Welcome, sirs! I can't tell you how good it is to find guests in the palace! I am TeeCee-Sixteen and I am at your service."
He was captured by the Republic in the Battle of Cato Neimoidia, and served Jedi Generals Anakin Skywalker and Obi-Wan Kenobi as a translator in their subsequent mission to Charros IV. He later was refurbished by the Xi Charrians and assigned as a translator to Aurek Team.
After he witnessed Aurek Team's death at the hands of Darth Sidious, and combined with his own sudden reversal of loyalties, the spared TC-16 apparently suffered the droid equivalent of a mental breakdown. In a discussion with C-3PO, he predicted the coming dark times and that the line between good and evil would become blurred. He then advised C-3PO to accept a mind wipe if ever offered, as the alternative would be permanent fear and confusion.
TC's posture was slouched due to a damaged pelvic joint, and he suffered from circuitry corrosion.
- Labyrinth of Evil (First appearance)