I already knew you were someone of importance. The fact is I really don't care.

[ Because whatever he had been before he and Ventus had separated no longer matters. Ventus doesn't remember anything and Vanitas has only fragments. Whatever they had been they aren't any longer. The person they were no longer exists.

He notices that the keyblade isn't quite in an aggressive position, but he doesn't trust it. Not yet. ]

Though really it's not hard to figure out, is it? Half is half. Someone had the wonderful idea to separate myself and my other half.