Ah, Kelly, smart-but-naive was exactly what I was going for with this character, so thank you. Have you written a younger McGonagall? This is my first attempt, and it was difficult to image what she might have been like, before she acquired the poise of middle age.
I had a couple scattered thoughts about brooms and magic in my comment to Min, below. I think mostly I was/am a bit horrified by the blood-essentialism of the wizarding world--the idea that we fans seem to accept so readily that certain people have this one innate quality that makes them somehow special and those who somehow are born without it should be exiled to the periphery. It tickled me to no end to have a Squib as the heroine of a beholder story, someone whose lack of magic is not so much compensated for as fundamentally irrelevant. M.