"Wow. Feel free to tell me to slow down if I get out of hand; I'm told that can happen sometimes, and this is one of the most fascinating things I've encountered.
"Do you know why it's only girls? As far as we can tell, there aren't any differences between genders that are nearly pronounced enough that I would expect to have a Yes/No disparity; Psychic powers tend to show up slightly more often in females than in men, but that's not usually readily noticeable without doing lots of statistics and is easily confounded by external variables, and while Aura is even rarer and less understood it also shows up in both genders, and we don't know if the observed skew towards male users is even real. That's true for most Pokémon as well; I'm only aware of a handful of species with notable sexual dimorphism for their capabilities, out of about 800 known species, and even these aren't usually as extreme as what you describe.
"Do you know if the running in families is due to genetic? I assume you don't know the exact cause, but if all magical girls have some special gene that could be fascinating.
"Are the specialties prescriptive, and there's a way of determining what they are, or descriptive?
"How does looking inhuman relate to the magic? Does it matter if the way humans as a whole change how they look?"