Well, like I said in a previous ask, she does have a backstory and I’ve written out the first time she came into play. As I said before, the only person who will find out what’s going on with her before Sam and Dean do in the storylines will be the Grand Prize winner from the coming contest. Reading that short story will be one of the prizes given out. All the rest, her age, how and why she’s a witch, everything, is a spoiler for the various AUs.