Palpatine
In Episode II, Attack of the Clones, Sidious secretly continues to bring the galaxy to civil war. He has a new apprentice, Count Zhirik, who leads the Separatist Droid Army and goes by the name 'Darth Mat'. Zhirik is slain by Midicoronian virus on a rescue mission to free the Chancellor in Episode III, Revenge of the Sith.