C-3TC was a protocol droid that was under the ownership of Valance Serth just months prior to the Battle of Yavin. Serth found himself the target of several attacks by agents of the Black Sun, who wanted to recover C-3TC. After Valance was attacked, C-3TC was left to wander aimlessly through the jungles of the unknown planet. The droid also eventually found its way to the city of Moenia on Naboo, where it resided for some time after the attack on Valance.