Greta was trying to be good but her skin felt like it was crawling and she'd left her cellphone at Klaus, so she couldn't call him. She needed blood though, she could feel her fangs through her gums, her facial features were changing as she hid her face as she walked, bumping into a human- no, maybe...no. She could feel something but she wasn't sure what it was, but it wasn't nice, it was evil...
She bared her fangs at him, then backed away a little, trying to calm herself down.