For those who already finished the game ..when Riku takes off his coat in the NEO world you can see it ''flying'' away and i don't think it's bc of the wind . You also don't see any feet or hands but i think u don't see 'em bc of the perspective. If it is a person ''flying'' away It could be The xehanort form who remained in the coat (lol)and which is encountering the knights in the SE . What do you think?