Arthur Weasley had heard Ginny's yelp, but hadn't been as fast as Ron to come to her, now Ron was between the boy and Ginny, while he himself stood behind the boy, who was backing away from Ron. Ginny was getting back up on her feet, but her head kept jerking to the side, clearly she felt stressed over something.
Harry stood frozen in his place, afraid to turn around to see who was behind him, and afraid of the boy in front of him, he looked at the girl who had gotten back up on her feet. "Yyyy… you okay?" Harry stuttered at the girl, trying to ignore his growing fear of the other people around.