I read something yesterday, it read:

"A lot of times as a writer you plan things out in advance.  You know exactly where you want the story to go, and it's perfect.  And then your characters betray you.  Like belligerent toddlers they race off in opposite direction from where you wanted them to go, and the most annoying part is that it's usually better."
Guardians of the Queen and especially Leelah have changed tremendously. At first, it was planned as a stand alone novel (not a series).  Leelah didn't have powers and wasn't apart of a group that would eventually help save the world.
The characters really do get a mind of their own.  As I wrote her story, I was always surprised when a new twist or turn occurred.  After I would go over what I just wrote, I'd find myself liking it more than what I initially envisioned.  Like, Cora for instance, she sort of just popped herself into the story and I'm so happy she did!
So this all got me thinking!  Book one, and even book two has changed tremendously, so what will my ending be like?  I've realized that I have no idea and I'm completely okay with that.  I'll just continue letting my characters do what they want.  So far, it seems to be working out just fine!