I'm a little shocked with everyone's response to Lea possibly being a keyblade wielder; it makes sense. On top of having a powerful will (proven by his ability to become a human-like nobody), it was poked at that Roxas made him seem like he had emotions and feelings, even though he lacked a heart. Maybe he did have genuine emotions, not because of Roxas, but because he was the nobody of someone with a heart powerful enough to wield a keyblade, just as Roxas did.