Starkiller, also known by his original name of Galen Marek and Subject 1138, is the main protagonist of The Force Unleashed II. He is a clone of the original Starkiller in the game. He was born with the sole purpose of replacing the original Galen Marek as Vader's secret Sith apprentice and assassin, but went rogue and sought to defeat Vader and aid the Rebel Alliance that Marek had previously helped create.