... Wait it does? [Well there's a first.] People can lose their hearts where you come from too?

[He didn't think she was from a world within his universe, but maybe he's mistaken. When she asks how he got it back, though, he grimaces a little and rubs the back of his neck.] That... requires a bit more explanation, ah. [He starts walking again.] So, where I come from, there are monsters called Heartless. They consume hearts, and if you get attacked by one, you can lose yours. There are other ways, that's just the easiest to explain. So when my world was destroyed by them, I lost my heart.

But... that's not all, ah. [He absently presses his hand to his chest, then pulls it away, fidgeting.] When you... when you lose your heart, you're split into two pieces: the Heartless, which is a misnomer because that's the piece with the heart; and the Nobody, which is what I was when you knew me before. When I was called Axel, it was because I was the half of me that no longer had a heart.

[He pauses.] Follow?