Just a small theory I thought of earlier as to how Roxas looks like Ven, and why Roxas is a special nobody and why Roxas can weild a keyblade.
Theory: Ven merges with Sora. Sora turns into a heartless, and Sora's nobody is formed who we assume is Roxas. But Sora's nobody is actually Ven, who has forgotten who he is. But sometime up to Roxas's and Sora's fight, Ven remembers who he is and says, 'so thats why they chose you', or something to that affect, and 'they' being Terra and Aqua.
Sorry if it's alittle clattered in some places.
Theory: Ven merges with Sora. Sora turns into a heartless, and Sora's nobody is formed who we assume is Roxas. But Sora's nobody is actually Ven, who has forgotten who he is. But sometime up to Roxas's and Sora's fight, Ven remembers who he is and says, 'so thats why they chose you', or something to that affect, and 'they' being Terra and Aqua.
Sorry if it's alittle clattered in some places.