Hermione didn't know who the man was who was barking orders at them, but she jumped up just after Harry, reaching, again, for a wand that wasn't there and cursing quietly under her breath at the instinct when she knew she didn't have wand any longer.
There was nothing to do but steel herself for a fight, really, even though she wasn't sure what she would do against a Death Eater's wand while she was powerless. She'd worked on wandless magic, but there weren't that many defensive spells that could be used without one.