[Sora...is silent, for a moment. He still has no regrets- he doesn't think he ever will- but this part is still hard to talk about, even now.]

The power of Waking isn't supposed to be used like that. It's to restore lost hearts, not travel through time. Chirithy called it a "Nature Taboo". I wasn't supposed to do what I did, and I knew that...but I did it anyway. Which meant I was gonna pay a price so things weren't left...out of balance, I guess.

[He still doesn't fully understand it, if he's honest. Just that he knows that Chirithy wasn't lying, and nor was Xehanort.]

But after that, we were able to continue where we couldn't before. And we won.

[...]

But I couldn't stay.

[Sora faded from the world not long after Xehanort was defeated. He'd assumed he'd died, more or less, and wasn't really expecting to end up...anywhere.]

...when I disappeared from my world, though...I ended up there. And that's where I've been ever since.