My friend Shaun and I were discussing some of the theories, like how Xion is part Aqua and Maybe part Kairi, and how Ven was placed Inside of Sora, etc. What If she Isn't Kairi or Aqua though, what If she Is made from the remnants of memories that Left Sora when he became a heartless, those memories that should have should have been Roxas's and ( If the Ven Inside of Sora theories are true?) Ven's memories that left Sora's body and had nowhere to go. Could the power of a Keyblade wielder cause a new type of Bieng, Neither Nobody or heartless? It would explain why Xion resembles both Aqua and Kairi, and maybe the reason her looks change is because Sora's memories are being taken from Xion and returned to Sora which leave's only Ven's memories which changes her to look more and more like Aqua.I'd Love to hear peoples Idea's and thought's. Even flames, as I'll just look at them as Constructive Criticism XD