Please note that this is just a theory. I actually didn't come up with this on my own, either. I found it while reading a fanfiction on FanFiction.net. However, this theory is quite plausible.
Basically, what happened in their story was that after freeing Terra from Xehanort's control, Xehanort used his own pure darkness to possess Kairi and create the X-blade.
DON'T CRITICIZE JUST YET!!!!!
Personally, I don't think Xehanort is pure darkness, so he couldn't possess Kairi. However, there are parts of this theory that just might be true!
We all know that Kairi is a princess of heart, right? Well... to put it simply:
Kairi=Princess of Heart=Heart of pure light=Potential X-blade?
We also know that although she will not be taking the Mark of Mastery exam, she is still an official keyblade wielder. (Nomura confirmed this somewhere (can't remember where, though...)) Why would she be given a keyblade if she were not to use it for some special purpose? As far as I can tell, the heart of pure light and the heart of pure darkness have to be keyblade wielders, but I may be wrong.
Also...
Yen Sid said that Xehanort may not be alone. Could he have found another heart of pure darkness somehow?
There may be many flaws to this theory, but if you think about it, it could happen! What are your own thoughts?
Also, here's the link to that part of the fanfiction if anyone is interested.
Please note that this is just a theory. I actually didn't come up with this on my own, either. I found it while reading a fanfiction on FanFiction.net. However, this theory is quite plausible.
Basically, what happened in their story was that after freeing Terra from Xehanort's control, Xehanort used his own pure darkness to possess Kairi and create the X-blade.
DON'T CRITICIZE JUST YET!!!!!
Personally, I don't think Xehanort is pure darkness, so he couldn't possess Kairi. However, there are parts of this theory that just might be true!
We all know that Kairi is a princess of heart, right? Well... to put it simply:
Kairi=Princess of Heart=Heart of pure light=Potential X-blade?
We also know that although she will not be taking the Mark of Mastery exam, she is still an official keyblade wielder. (Nomura confirmed this somewhere (can't remember where, though...)) Why would she be given a keyblade if she were not to use it for some special purpose? As far as I can tell, the heart of pure light and the heart of pure darkness have to be keyblade wielders, but I may be wrong.
Also...
Yen Sid said that Xehanort may not be alone. Could he have found another heart of pure darkness somehow?
There may be many flaws to this theory, but if you think about it, it could happen! What are your own thoughts?
Also, here's the link to that part of the fanfiction if anyone is interested.
Link