Something makes Procella stop, something about the way Hisame carries herself.  That [i]tension[/i], the grip of her hand, the look on her face, all so full of delicious killing intent.  The storm spirit giggles, skipping lightly to one side, circling the other woman.  This one's decided to be naughty!

Her body swings from side to side like a pendulum, as Procella cranes her head to look at Hisame from every angle.  Where should she start cutting?  Oh, how about... there!

Though utterly mad, Procella is not entirely stupid, and knows better than to step within reach of that nasty, ugly blade.  Instead, one of her arms suddenly whips around, in what looks like a wild, uncontrolled swing, but is in fact carefully aimed.  Her flying fingers loosen, and the knife takes to the air, its deadly point aimed for Hisame's neck.  Even as she made this movement, Procella's other hand was reaching for another blade, for they had joined in the dance of battle now, and she could not stop until that woman lay bleeding before her. 

The spirit's dark eyes turned their gaze to the woman's left arm, watching the charges within it, and twisted them.  The negative charges were pushed out, away into the air and other parts of Hisame's body, leaving a net positive charge gradually accumulating within the limb.  There would be no immediate effect on the arm- Procella was merely finding her target.