There was a brief, dark feeling weedling its way into Riku's thoughts. What if? But Riku had been granted the title of Keyblade Master. He'd fought hard to get to where he was, and conquered the darkness. That was why he was able to walk here without fear

Well..

Mostly without fear.

Riku watches closely, trying to shake that unnerved feeling that this was Sora swallowed by Darkness. His worst nightmare, come to life.

"It doesn't." Riku at least kept his voice flat and unimpressed. He knew Master Xehanort. He also knew that they'd defeated each form of him so far and it was only a matter of time until they defeated Xehanort as well.

"It looks like you were abandoned. Were you that bad of an apprentice?" Well, that was just kind of mean.