C'mon Xion might be related to Kairi in sum way cuz can normal humans even weild the keyblade or is Kairi just one of they Keyblade masters?
Remember in Castle Oblivion when Sora got cover in heartless and Riku hands Kairi a keyblade and she's able to weild it.that must prove that she might be part of xion and be a keyblade master.
