I like to theorize on a possible appearance of Namine in this game.

 

• We might learn exactly why she has those memory manipulation powers. KHII shows that even Namine doesn't know why.
• Namine acting as one of those projection types that only one person can see. And that person is Kairi. Think about it, either anywhere, or just in place of Kairi's reflection.
• Continuing from number two. Namine might Kairi some helpful tips, if the latter is playable. It'll be like the Cheshire Cat from American McGee's Alice.

Number two is inspired by Handsome Jack's role in Tales from the Borderlands.

I like to theorize on a possible appearance of Namine in this game.

 

• We might learn exactly why she has those memory manipulation powers. KHII shows that even Namine doesn't know why.
• Namine acting as one of those projection types that only one person can see. And that person is Kairi. Think about it, either anywhere, or just in place of Kairi's reflection.
• Continuing from number two. Namine might Kairi some helpful tips, if the latter is playable. It'll be like the Cheshire Cat from American McGee's Alice.

Number two is inspired by Handsome Jack's role in Tales from the Borderlands.

1.  think its cause she's litterly Sora's and Kairi's nobody child she came from both of them so maybe thts why 

2.i have no idea i mean she is partly Soras nobody so maybe 

3. I dont see Namie in a fighting part but then again i never saw Kairi like tht either and its happening 

I thought the first was that she is special for being the Nobody of  Princess of Heart, which logically should never be able to happen because their hearts are devoid of darkness so cool stuff happens.

Well how do you think people will react if they only see Kairi talking to herself?

she has about a 85% chance of becoming her own person

that's about it

The other 15%?

Actually, you guys are forgetting the fact that she has a part of Ventus in her took hence the blonde hair. Chances are, Tetsuya will find a way to implement her as her own being along with Roxas and Xion.

My theory:

 

Xehanort will fail to get Kairi (as princess of heart) and he will use Namine as some sort of replacement.