Riku was a seriously confident sort of guy. There was very little that he didn't think he could handle, and even less that he would back down from. So it didn't take a rocket scientist to figure that he would go with her. "I'll walk with you," he said with a quick nod, and letting his keyblade seemingly disappear into nothingness. If anything happened, he'd be able to get it back fast enough to cover himself, no problem.
"So. Fictional huh?" Just the idea of that kinda pissed Riku off. He had done too many things in his life that he wasn't proud of, that he didn't want people to know about. "I'm not exactly alright with that. And I'm pretty sure I'm going to have to see some proof before I believe it." After all, the woman hadn't even said his name.