Characters

We all know the stories where a knight saves a Princess from a dragon. Tail as old as time. But what about a knight saving a dragon from a princess?
The kingdoms of this world are all accompanied by a royal family of dragons. They are mostly the same breed, kinda big, breathes fire, ect. One kingdom's Princess loves dragons, sorry, I mean; loves to keep dragons as pets. But, she messes with the wrong dragon and the wrong knight!