Xion might yet be Kairi's Nobody that was born on the night of the storm, again - lacking a Body and a Soul.
Except that would mean she was 'born' or 'created' before Roxas in Hollow Bastion.
He is #13, she is #14.
She can wield the keyblade, which wouldn't be explained by her 'birth' at the storm or her connections with Kairi

If there was any holes in my logic, it would help if you pointed them out. Seriously, it wouldn't hurt if you used logic to prove me wrong
In a way we don't know that could yet contradict everything you said.
...What? I see that we just agreed that Roxas is related and connected to Ventus, how does what contradict anything i said? Isn't it possible that they are connected
and related?
actually wouldn't be surprised if Nomura would pop one out eventually. Said Nobody wouldn't be his Body and Soul, but seeing how Naminé is neither Kairi's B+S nor Sora's, that kind of leaves a lot of room for Special Nobodies to pop up all over the place.
the first part is irritating, she second part doesn't make sense, and the third part is ridiculous
-that's nice that it wouldn't surprise you, but we talking about what makes sense, not what you don't not expect
-Namine was born when Kairis heart left Soras body in Hollow Bastion, so she is Soras body and Kairis soul. who ever said otherwise?
-if everynobody was a special case, what would be so special bout them? Roxas and Namine. thats it. its from Hollow Bastion in KH1. no more. Xion? WE DON'T KNOW!!! she's a special case, but seeing as we don't know how, there's no point in going into it. really, what would you be going into?
I'm sorry, but I saw not much of either in your post.
hm. you must have not read it.