As she rushed over to her girlfriend's side, Heidi kneeled in front of her to look at what had happened. In any other circumstance, Heidi would have found Tracey's voice absolutely adorable. But right now, she wanted to deck whoever did this to her.
Taking out her wand, Heidi used the counter spell for the hex. Being best friends with Ginny Weasley, the Bat Bogey hex queen, She of course knew the proper counter and had been the victim of the hex herself before. "Is that better?" she asked once she saw that the bats were disappearing.
"Who did this?" she asked, still on one knee in front of Tracey, a hand on the blonde's knee.