Oh okay I get it Naminé, Roxas, and Xion will come to exist separately.
But wouldn't that make it more than 7 keyblade wielders vs the 13 Darkness?
1. Sora
2. Riku [Master]
3. Kairi
4. Terra
5. Aqua [Master]
6. Ventus
7. Mickey [Master]
8. Lea
9. Roxas
10. Xion
Unless they only planned on...