Grace observed unfazed as Hunter-beast furiously attacked and ripped large fragments of quickly solidifying slabs of the freshly refilled reaction mass, leaving pieces of ice laying everywhere. As she noticed he's readying to jump at Lumi she quickly moved in between, making the ground tremble a bit.
"No," she just said with her deep and dreadful voice, but there was no need to stop him, as Lorkin used magic on him, restoring him to his normal form.
As Lumi lay unconscious, Grace stood by her without a slightest flinch or sound.