Starlight

Starlight (also known as Starkiller) was a clone of Galen Marek, created by Darth Vader

Creation
Six months after the death of Galen Marek, Darth Vader took his body to Kamino and cloned him, hoping for a more powerful and obedient version of his deceased apprentice. Vader was able to create a stable clone of Galen Marek. However, due to the fact that the accelerated cloning process was incomplete, the clone began to experience visions, including the sound of the rustling forests of Galen's home planet, a warning from someone during a past battle his template took part in, and a woman's voice.

Escaping Kabino
Starkiller easily dispatched all of the Rebel Troopers, but having inherited the memories and feelings from his genetic template, he was unable able to strike at the droid impersonating Juno. Vader destroyed the droid, and informed the confused clone that he was suffering from the same side effects of the accelerated cloning procedure just like all of the other clones before him. He warned the clone that he was going to be abandoned if he didn't ignore the visions. Just as Starkiller asked what would happen to him then, he experienced another vision; the original Starkiller being stabbed in the back by Vader himself on board the Executor.

Now fully convinced that Vader was going to kill him, Starkiller unexpectedly unleashed a bolt of Force lightning at his master before blowing a hole in the wall and escaping. After killing numerous Stormtroopers and destroying TIE fighters on his way, Starkiller found the one way to get off Kamino, his master's TIE fighter. After quickly disposing of the Stormtroopers and AT-STs guarding it, he took the ship and flew to Cato Neimoidia, to seek out Rahm Kota in order to find out where Juno Eclipse was located.