No, but just because she looks like Kairi doesn't mean she's Kairi's Nobody. Sure, this thread is about HOW Xion could be Kairi's second Nobody, but that doesn't necessarily mean she is.
Point is: We don't have any proof.
Edit:
You know what would be a real kicker? If Xion was Riku's nobody.
I mean, most of Org. XIII seems gender confused anyways....
Uh... No. Even if you are kidding, that wouldn't be possible in the first place. Like SA said, Riku does not have a female heart in a male body. Also, Riku technically became a Heartless. Sure, his heart was kicked out of his body, but has it ever been said that he became a Heartless? No. So, no Heartless = No Nobody.
What do you mean by 'gender confused'? Every single one of Organization XIII was the gender that they were supposed to be. They knew it too. If you're referring to Marluxia and his pink hair and saying he was supposed to be a girl as a result of it, that is a stereotype, associating girls with the color pink and flowers.
I wasn't very serious. I just thought it'd be interesting. Axel's just made sense if Riku were to have a nobody.
I'm just ready to watch us all be wrong about Xion and have it be some insane thing we've never thought of.
Should Riku have produced a Nobody, it wouldn't be Axel.
1) Axel is already an adult. This is obvious. His physical appearance is older than Riku's, he's a great deal taller than Riku, and they have no similarities with each other. At all. Sure, Nobodies are supposed to differentiate from their others a tad bit, but they shouldn't look like two different people. Until Ale shows up in the series (which I'm kinda hoping never happens), we'll just leave it as Axel has no ties to anyone in the KH universe other than being friends with Roxas.
and possibly Xion.
2) Bah. Someone would have thought of it. They just wouldn't have said it until it came out. >>;