XS3

XS3 was an Imperial assassin droid.

Biography
Shortly after the Battle of Yavin, XS3 dispatched to execute Hanos Darr and the miners who learned of the location of the Royal Palace of Alderaan in the asteroid rubble of the planet. XS3 and Zaz Hamiroz discovered that the palace's existence was a ruse to lure Leia Organa to Alderaan, where Darth Vader and a contingent of stormtroopers awaited her. The two managed to board the Ithorian herdship Bazaar and get a message to Poliss, warning the Alliance of the deception. XS3 was sent to eliminate the miners before they could transmit their message.