starberryshake
You're characters are accepted, and Aurora can be Fay's apprentice

The only thing I'd change is their backstory slightly. Simply because the centaur kinda live all together in one big tree for the most part. Some live in small huts near the tree, but most do not want to stray too far from it because they are stronger in numbers.
So them "running away" from their dad is kinda strange.
If I may make a suggestion, maybe it was their dad that actually runs away from the herd, abandoning his kids and never being seen again? The kids from there are raised by the herd. The herd in general work a lot like a family unite, and would not want the kids fending for themselves.
That's my own idea, but feel free to tweak it in your own way.
One more side note is that I have a hard time reading the really light color you put the forums in. That's more of a personal thing though, so you don't have to change it if you like it.