From Slavemaker Wiki
This is a special stat for Aqua. She start the training with 10.
- The Keyblade is a special kind of sword shaped like a key. A Keyblade is only able to be used by those that the Keyblade itself chooses. A Keyblade wielder can summon and de-summon it as they please. The only ones who can are: Aqua, Xion, Kairi, Terra, and Ven.