358/2 Days Xion and Zexion Theory...

I dont know what would make her a Nobody. I still think she is a representation of Sora's memories leaking out as it was said in the trailer.

 

The name thing might be a coincidence. One of the other things that might support this is Riku said Xion's Keyblade is fake. This might be true because it might be a illusion and Zexion makes illusions. I still doubt this theory, though.

 

I just can't see how any connection between Xion and Zexion could occur... wait, I've just hd a thought.

Kairi is originally from Hollow Bastion/Radient Garden, correct? at the time she was sent to Destiny Islands, Xehanort had already become a heartless, but Ienzo originally lived in HB when he was an apprentice, alongside Xehanort under Ansem the Wise. This means Kairi would still have been there when Ienzo was. Kairi may have been some relation to Ienzo? This is all speculation, of course, but I don't see this as a major point.

I still think that Xion is not a nobody, but a similar being as close to a nobody as is physically possible. I think she was formed out of escaped remnants of Sora's memory of Kairi, as Namine mentions to DiZ that Sora's progress of regaining memories had stopped, and Kairi was the reason he began to remember again. She also says that something may have escaped? I can't quite remember the translation.