poor girl! How scary!
I have no idea what your coop space situation is, but do you have the room to close her into her own space, somehow? (dog crate, penned off space, something like that?)
We are super-limited in ours...it is just a glorified broom cupboard, but I keep the space underneath the nest boxes penned off. We use it for roo jail, broody kingdom, injury separation, etc. When nobody is in it, we just keep it open, and it gives us a little more floor space.
I hope you can find a way to safely keep her at night, without risking trouble with the rest of the flock.
Good luck!