Well, I didn't lose my heart. I never had one. Sora lost his and that's how I exist. I'm...Sora without his heart. Sort of.

Lea lost his heart before and I called him Axel. I knew him when he was a Nobody like me and now he got his heart back and he's back to normal. Axel and Lea were the same, it wasn't like two people.

For some reason me and Sora are two people at the same time. I don't really know why. Lea might know, or even Naminé.