There was nothing left in Frau to do the fighting. His consciousness had been swallowed completely which left only the twelve year old version of himself to fight. To try to pull himself out of the body of the scythe that had consumed all but one hand long ago. He had no chance of escaping without aide.

when the smoke finally cleared completely, Frau stood before them with a wide, mocking grin on his face. He'd broken one of their little restraints and he had every intention of breaking the rest of them too. He leaned down so he would be on eye level with Hitsugaya and Hinamori and just stared at them with the same wide smile. While the only sound escaping his mouth was slow, quiet laughs, the words were there in his eyes.

I'm coming for you. You have no way to control me, silly little things.