"B1" was the nickname of a B1-series battle droid that was sold by Sidon Ithano to Kragan Gorr and the Warbird gang. After Gorr planned to mutiny against Captain Imanuel Doza, Neeku Vozo grew suspicious and secretly reprogrammed B1 to be loyal to him and to be the commander of the B2-series super battle droids. B1 played a crucial role in defeating Kragan and the Warbirds' mutiny against Captain Doza. However, he was destroyed soon after, haplessly falling victim to the attack of an Aeosian warrior.