Dr. Agony: "I honestly haven't though about that... I think it was due time to get you a sister... Then again, there was that one..."
Your master stares at the ground and dismisses the dilemma.
He then looks up to you and says that you're one of the last of the Dragon Guardian's descendants. Well, in a way you aren't really since all bloodlines of Dragonox has since been deceased.
You ask your master who Dragonox was, and he simply tells you that she was a dracolich. His answer puzzles you, and Dr. Agony sees it in your eyes. He tells you that you are in not undead, yet. This also explains your avoidance of light.
oh god dragon incest
You think this to yourself and decide that it isn't technically the case. You aren't really related in some way, if she was created.