After Roxas beat her, he absorbed her into himself, obtaining, Oathkeeper and Oblivion.
Xion can use all the keyblades in Mission Mode, although her primary keyblade is the Kingdom Key.
Xion is a puppet created to team up with roxas so the keyblade's power would rub off on her and then she would get a keyblade... in the long run, to finish kingdom hearts faster...
Xion is the 14th member of the Orginization. She, like Roxas, can weild a keyblade. She is also from Castle Oblivion and loses the power to weild a Keyblade (Just for a little.)
... do you mean Xion? If so, Xion isn't Kairi's nobody, Namine is. Xion is simply the result of an experiment in Castle Oblivion on Sora; she's an "imperfect replica of Sora". That's why she's able to wield the keyblade
The Keyblade Wielders are Sora/Roxas/Xion,Kairi,Riku, ,Ventus/Vantais,Terra,Aqua,and Master Equas
He gets the dual wield ability after absorbing Xion.
Yes, I believe she's part of Sora's memories too.
Axel was ordered to stop Xion from betraying the Organization. Xion was important to Organization XIII and their plan on harnessing the power of the Keyblade, so when Xion was informed by Riku of Org. XIII's plans, Axel had to stop her from further interfering.
No one knows yet! ------------------------------------------------------------------------------------------------------------ She is known for her ability to control the keyblade.
Xion... Xion is a replica of Sora intended to merge with Roxas, thus forming an incomplete Keyblade wielder. She does not have a heart, nor would Organization XIII change their name a to ascertain the situation. As Saix says, "Count the seats. When have we ever been more than thirteen?"
Axel wants Xion to return to Organization XIII, but she wanted to return to Sora. At the same time, Xion pretty much wantedto be eliminated, because Namine told Xion that if Xion returns to Sora, she'd return Sora's memories so he can reawaken and destroy Organization XIII.
They don't need to be. They're with Sora, who does have the keyblade. Anyone with Sora is capable of releasing the hearts and the keyblade absorbs them, or sends them to where they need to be. This is sort of explained in 358/2, with Xion losing her ability to wield the keyblade, so she teams up with Roxas, who can.