This is kind of an old picture but I still like. Basically it depicts the three basic stages of Kiya Hock's life.
First she's just a little girl given all this power to guard and she's not quite sure what to do with it. Then she's supposed to be The Defender for the rest of her life sending her down the path of darkness sometimes which is why she's shaded darker there. And the final stage is when she isn't really Kiya Hocks anymore and has become The Creator of Vayla (which is why she's is all light and smiley and supposedly pure!)
I know The Creator looks a bit odd but I ran out of space!!!