I recently got VF4 evo and find Aoi to be my favorite because of her style. She is definately suitable as a defensive/reversing player but I'm having difficulties consistently blocking and reversing attacks of any kind. The YY stance is definately useful, but other than that, I can't block or reverse worth shit. If anyone has any advice that would be great. Otherwise tell me if it is just a matter of playing training and arcade mode over and over again until I get the whole reflex thing down.