[Starkiller beckons Obi-Wan to follow him, flipping down his hood so he's more visible.]

I used to be a Sith Apprentice, and my Master was Darth Vader. He...took me as a child. Murdered my father, and hid me away so he could train me to kill Jedi. He told me we were to kill the Emperor someday. He called me "Starkiller".

[A vision of an old man in Jedi robes floats through his mind "I never wanted this for you. I never wanted any of this for you. I'm sorry, son."]

I did as I was ordered. Hunted Jedi so I could get stronger, but Vader betrayed me. Made me gather the Emperor's enemies...he told me I was supposed to distract the Emperor, but all he wanted was to kill them himself.

[A particularly powerful vision flashes through Starkiller's mind, of him seeming to sacrifice himself to save the Rebel senators.]

I...I couldn't let him do it. I...I wanted to save them.

[Starkiller sighs. He's never actually told anyone about that. As conflicted as his thoughts are, his intentions are pure. As deep into the Dark Side as he is, he was a weapon of the Light.]