The place where Regen is trapped is a manifestation of perfect order. There is no change, no entropy: his fellow prisoners labor forever, pointless tasks their prison. They want badly to keep him there too.
Miss Chamuel is an agent of chaos, her wolf a roaring fury, her sword a flaming brand. They throw everything in her path, stone and steel and creatures of nightmare, but though she bleeds they cannot stand before her.
Regen is terrified, shaking, but not surprised. He expected this from the moment they met. For a good teacher, saving your life is part of the job.