Hermione took a step back, her arms out in front of her in a surrender. He didn't seem any older than herself; he couldn't be a Death Eater, could he? Herminone raised her wand, on the defense. For all she knew, Voldemort was still alive with his army out looking for Harry.
She kept her gaze steady, locking eyes with this man. She lowered her wand slightly, to show she wasn't going to try anything.
"My name is Hermione Granger, sir." She hesitated. What was she supposed to do? Blatantly ask if he was a Death Eater? "Uhm, I don't want to hurt you. I'm not a Death Eater."