The Sith Lord of Betrayal. The final boss in Kotor II.
"Yes, always. From the moment you awoke, I have used you. I have used you so that you might become strong, stronger than I. I used you to keep the Lords of the Sith from condemning the galaxy to death with their power unchecked. I used you to lure them to Telos, where they could be, at last, fought and killed. I used you to reveal Atris' corruption, so that her teachings could be ended before they began. I used you to gather the Jedi so they could be destroyed. And I used you to make those who wounded me reveal themselves, so they could be killed by the Republic." -Darth Treya