Against Ayane, use 9K as one of ur whiff punishers cuz Kasumi's 66K has a terrible hitbox, making it evaded by Ayane's 4P. On the other hand, Ayane often goes back-turned, if 9K hits her when she's back-turned, she'll be bounced just like how 9K after H+K does.
I recommend using 33K for most of...