Kingdom Hearts What about Sora's Heartless?

Also worth noting in that area is that it is unknown exactly why Sora retained a sense of self as a heartless in order to follow Donald, Goofy, and Kairi. Ansem the Wise theorizes that it was because he willingly chose to become a heartless as that is one of the few things that Sora has in common with the only other heartless to accomplish that; Ansem Seeker of Darkness. One of many cases of Sora running in an odd parallel to Xehanort while still being in striking contrast.

 

I think it was Sora who changed back from the heartless at the end of Hollow Bastion. The fact he can still use the heartless limit form in KHII strongly represents that. I still get a kick out of the fact that despite Sora's heart being strong, he's still a Shadow when he becomes one.