About me: As far as he knows, Sora is just an average young male, albeit a little bit cuddlier than his peers. Yet he somehow constantly finds himself in situations where he's being accused of things he swears he's never done! At first it was just a little bit annoying, but as more and more people told him of misadventures he had no recollection of whatsoever, it was getting confusing.
Unbeknownst to him, Sora had an unnaturally heightened sense of empathy. It wasn't clear what triggered it, but he was able to understand the feelings of others, to the point where he believed he was them. It was only natural that the real Sora had no recollection of what he was doing during these moments, as he was no longer himself.
That could be both a gift and a curse. At times, he was able to channel strength that would have been infinitely beyond his own capabilities. But he didn't get to choose, who he was becoming each time, neither could he control when to initiate it and when to stop it..