I really do not think Crowley belongs in this exchange, and I have to say I had an immediate kneejerk reaction of feeling extremely uncomfortable with the idea. For what it's worth I really enjoyed both the TV show and the book, and I'm all for people exploring Crowley's relationship to gender, but a femslash exchange is not the place for it.

I don't really think there's much in TV canon to indicate he identifies as anything but male (though you could make a case based on Neil Gaiman's tumblr), but I wouldn't kick up a fuss about this if not for the character's fannish presence. Crowley is one half of one of the BIGGEST boyslash ships right now. Crowley/Aziraphale has 11,000 fics on AO3 tagged M/M. ELEVEN THOUSAND!!!! It's absolutely everywhere and I really don't think you can disentangle this character from his place in fandom as the posterboy for boyslash (and thus his place in fandom as a male character).

In general, I am absolutely for erring on the side of inclusion, but like I said, this whole thing makes me very uncomfortable. :/