Someone with a pure heart. It would have to be a being of pure light, pure good, to weild a weapon as awsome as the Keyblade.
The keyblade chooses the keyblade master, the Kingdom Key chose Sora, Way to the Dawn chose Riku, but only Kairi's keyblade didn't, Riku gave her the keyblade
*SPOILERS*Terra fails to officially become a Keyblade Master because he falls into darkness, unlike Aqua, who does successfully became a Keyblade Master.
Yes, Sora is a chosen keyblade master. He is the main Keyblade wielder, the second being King Mickey. Sora was chosen to be the keyblade master because of his powerful heart and strength. SPOILER****************** Terra wanted Riku to be the keyblade master, but Sora's heart was more powerful, thus Sora was able to combine his heart with Ven, allowing him to wield any keyblade.
yes
When Aqua and Terra were inspected if they're worthy to be Keyblade Masters, Terra's darkness slipped because he feared of losing. Therefore, Terra failed the test, while Aqua successfully became a Keyblade Master.
The most powerful Keyblade is the one master Eriquas has, which is the given to Aqua when she becomes master, and when Eriquas' star disappears (Eriqas gets struck down)
The Keyblade Wielders are Sora/Roxas/Xion,Kairi,Riku, ,Ventus/Vantais,Terra,Aqua,and Master Equas
-Slight Spoiler-The Keyblade was appointed to Mickey, while he was under training with Master Yen Sid. The Keyblade doesn't only appear to those with strong hearts. The power of the Keyblade can also be appointed to those seen as fit by other Keyblade wielders.
KH keyblade wars [kbw] is before the original kingdom hearts and it tells the story of a keyblade master, and instead of heartless and nobodies theres unversed, which are blue with red eyes.
Yes, Axel does have a keyblade but he doesn't have one (lea does) he revealed this after the epilogue, (everyone was freaked out even riku and yen master Sid :))
He can't. That is Riku's keyblade. actually, he can because as long as you're a keyblade master, you can use anyones keyblade. for example, at the end of KH2 when sora killed Xemnas, or when riku gave kairi her keyblade.
That would be Master Xehanort, a master of the keyblade who goes missing with his partner, Vanitas.