Okay, here's something I've been thinking about, and it sounds plausible, though I don't have that much evidence to back it up, but here it is:
What if Kairi's Keyblade, given to Kairi by Riku towards the end of Kingdom Hearts II, was originally Xion's?
I can only base this claim around the fact that Riku and Xion meet quite a few times, at least once on Destiny Islands around which Kairi's Keyblade seems to be based, and maybe Xion found some key chain to attach to her Kingdom Key. That is one thing to think about in regards to where the hell Riku just pulled another Keyblade seemingly out of nowhere and gave it to Kairi who, after all, appears to have a strong connection to Xion.
But that's just me.
What if Kairi's Keyblade, given to Kairi by Riku towards the end of Kingdom Hearts II, was originally Xion's?
I can only base this claim around the fact that Riku and Xion meet quite a few times, at least once on Destiny Islands around which Kairi's Keyblade seems to be based, and maybe Xion found some key chain to attach to her Kingdom Key. That is one thing to think about in regards to where the hell Riku just pulled another Keyblade seemingly out of nowhere and gave it to Kairi who, after all, appears to have a strong connection to Xion.
But that's just me.