From the amount of blushing around Fay, and Fay's comment about the cutest boy being a girl now, methinks Harry may be a bit bi, with some reciprocations from Fay here. Possibly demisexual(attraction influenced heavily by emotional attachments). The existence of an OC in the form of Fay suggests planned hijinks of some sort, but then canon Gryffindor didn't really have a girl in Harry's year who could fill the role Fay is filling.
I like that a major point of a girl's development, her first period, comes up but isn't harped on. It's a hard balance to hit, because anybody who'd only been a girl a couple of months is going to have some difficulty here, but it often gets focused on more than is entirely appropriate, given the age of the characters in question.
One HP fic had Hermione researching how to turn Harry back into a boy and how to keep Ron as a girl(changed by totally separate causes, with Ron knowing that she would be a he again in a year, but had found she enjoyed being female). That kind of mess is why I don't blame the author that it never came up at all(at least, it had not since the last updated chapter).
"Harry, you didn't have anything to do with Malfoy's trip to the hospital wing, did you, Harry?
Two "Harry"s in this sentence. Shift the punctuation a bit, and it could work as, "Really? Harry?"
Gekkou_Yoko: Fibber Fibber! You can't sing! Chu can barely limerick!
Hey, they didn't say it was
good singing.