Glancing up at Aqua, Xion nodded. She hesitates, wondering if she should mention so many of the other things involved - them having the same keyblade, losing hers for a time. But ultimately she holds off, for now.

"And... we don't really know, about anybody else."

Except... Sora, she thinks. But Sora was such a mystery it was hard to know where to begin with that.