Hear Me Roar for Fire and Blood

Every Targaryen from elder to newborn, slaughtered, except for one.
Saved and taken in as a ward by Lord Eddard Stark Rheaneasa Targaryen was raised as one of his own.
She grew up happy and loved by the Stark family and the people of Winterfell

But when news arrives of the King's journey North Rheanesa's life will be drastically changed.
The King has decided that this sun dragon shall be married off to the Lannister bastard.

The King believes that he is both punishing and humiliating two families that he despises, but he has possibly just made the biggest mistake of his life.