W-wait, hang on just a minute.

[For a while now Krone has been increasingly still - except insofar as she's posturing almost wary of Osomatsu.]

The two fingers outstretched would obviously be consistent with a scratching position, but if we're using the past fight to assume she didn't go to the effort of scratching when she paralyzed her attacker, and Arthur's vision primarily depicts Akko running away—not to mention the coup de gras was from behind...