You were Aegon I's third and youngest wife, his favorite little sweetheart. He had loved you so much... despite your unfortunate situation. You were unable to give him children and that was the worst part of it, he claims.
You were a vampire, doomed to forever walk the earth in darkness and you could do nothing about it but watch as times moved.
You left the Red Keep shortly after Visenya's death and no one really noticed your disappearance, they hadn't noticed at first and just thought you didn't come around. The people that knew of you stopped telling their children and family of your existence. It was not long before your existence kind of turned into a myth, a rumor by the maester's when they wrote in their silly little book that would soon be turned into history books.
You watched the rise and fall of your house but you did nothing to stop it, remaining to yourself. Nothing seem to feel right without Aegon by her side. You watched your family... destroying itself but you knew you could be of no help. They'd just want you to chose and that wasn't something she was doing. She just wasn't the same without her Aegon
It was about 150 years later that you heard of one of the last remaining Targ's, Da3nerys, hatching dragons and your eyes widened, wanting to see it for yourself but you waited for her to come to Dragonstone.
You watched from the window of the tallest tower, thank the Lords, they were on the not bright sky and watched the three beautiful dragons, as amazing as she remembered it.
You stayed hidden for a good while and before finally revealing yourself to the other human. "Queen Da3nerys..." you felt the sudden need to feel her and just genuinely check her over to make sure everything was okay, especially after you heard how Jon Snow had heard her and betrayed her.
Dany tried not to look startled as she spun around. "Who are you?" She exclaimed loudly and her watch dogs probably heard and would be one their way.