And too much of a girl for the boys, too much of a boy for the girls, and with a head full of stories? Ashildr is me. And I'm not letting fandom take her away from me!
Ashildr is also Amy:

'You're in the most trouble of anyone in this school, apart from boys."
"And you!"
"I count as a boy?"

And a head full of stories, to be sure. Amy also had the ability to make stories real.