K0-29 was a battle droid in the employ of the Sith Empire during the Galactic War. During the invasion of Belsavis, K0-29 was tasked with guarding the probe droid TA-350 deep in the Tomb on Belsavis, though TA-350 was of the opinion that K0-29 was unintelligent—it reacted threateningly to any organic that approached TA-350, regardless of whether they appeared to be Imperial.