Greyback advanced. Cho's back cringed as she bent away from him as far as possible, but was prevented by the ropes. Her face was white, teeth clenched. Hermione was unwillingly impressed at the fact that she made no sound but a gulp when Greyback reached out and ripped her robes straight down the middle, exposing a whalebone corset. He didn't stop there; his strength was immense enough that he did not have to use his knife when he did the same to her corset, allowing Cho's small breasts to spill free. They drooped slightly as their support was removed, but sat high on her thin white frame.