"Well it's not my Dad," Fred insists, because listing who isn't a potty mouth in town really is a much easier task. Unbeknownst to Fred, this claim is also erroneous. At least in part. Her father is both far too young and far too Muggle to be the mystery Potty Mouth, though.

"I'm trying to narrow down a field of suspects," she continues, at exactly the same volume as before. "But Freya's parents pulled her out of school when the brain monster got out of the hell hatch."