OH MY GOD
REAL SWORD MOVE OPPORTUNITY
YES
There's a move I like to do when I feel the swag overpowering me. Normally, the Furikaburi (raising the sword above your head) is done with efficiency in mind, but if you disguise the Furikaburi by staging it as a rising reverse grip swing, you can then meet the handle at the top of your arc and bring the sword down with both hands, catching their counterattack.
In Annie's case, she'd swing her arm around, bringing the blade up from the ground to the sky. As her arm reached it's highest point, she would loosen her grip, letting the blade rotate. As it did so, her opposite hand would come up to grip the hilt, and her original sword hand would then correctly grip it in a normal double hand grip. Then, she brings it down in a massive second blow.
From a gameplay standpoint, this would likely need to be a two-part rekka HP. The first part could even lift them, a la Cerebella's cr.MK.
I'm so wet thinking about this, right now.