C-3PX

C-3PX was a Cybot Galactica protocol droid reprogrammed to be an assassin droid.

In the years leading to the Blockade of Naboo he found himself in the service of Darth Maul, who severely modified the protocol droid to become a security droid for Scimitar, Maul's starship. Maul built 83 different weapons into the droid's chassis and improved his sensor package. After a successful mission, Maul lost the droid into the demolished Bartokk fortress, where he remained for years, partially dismantled.

Years later he was bought by Olag Greck and, after being left behind, finally found his freedom, becoming an infamous assassin droid.