Who was Wren Shard?

I thought she was a story... but I found something. Something undeniable. And I'm going to share it with you.

My father used to tell me stories about Wren. How she burned the 1987 Maelhollow Fair, how she hunted the organizers accros the U.S. for decades. And what she did before...

They were always stories to me, but he left a key to me in his will. And I found a box in the attic. It has pictues.