It was important to keep a close eye on the wielder of the keyblade. Up to this very day, I cannot claim to know the full truth behind Xemnas’ – behind Xehanort’s plan. The essential part this boy played in it was obvious nonetheless. It was only logical to let you watch him.
As always though, you didn’t quite act as I was expecting. You never did, and still I could have never forseen the outcome this would cause. By the time I realized, it was already too late.