That was kinda a long time ago too.

[ man... why do things get so complicated and sound so crazy... ]

It was Riku. His body anyway. Xehanort has this crazy idea of making other Xehanorts. Ansem, Seeker of Darkness, is one of those Xehanorts. He possessed Riku, trying to turn Riku into a Xehanort...

I think anyway.