One thing I'd read about Aspergers in girls is that one of the common traits (not that all of them have it, or anywhere near, but it's common), is a lack of an real sense of identity, a tendency to change/try on different identities in an attempt to find oneself.
I know someone who I strongly suspect is on the spectrum, and is female. I asked her to take the Aspie Quiz (which is flawed - I'm a former low-functioning autistic
and I scored 120, whereas someone I know who was diagnosed late with Aspergers scored 134), and her score turned out - 93 Aspie, 97 NT "You have a mix of Aspie and NT traits."
So what is she like? She was bullied a lot in school and in her church. She never understood why. She has a very distinctive voice (having a weird or unusual sounding voice is common with autism/Aspergers, but it's not true for everyone). She tends to latch onto one obsession, then like a year or so later, another. First she was obsessed with a certain book series and movie. Then it was a certain cartoon chaacter, to the point of dressing up as that character and taking selfies while cosplaying. Then she was obsessed with a certain character who appeared in TV commercials, and is now theming herself (complete with some cosplay) after him. She has also tied on different religious identities - first wiccan, then Satanist, and now atheist. She also has terrible spelling (I've encountered Aspies with excellent spelling and grammar, but there are those whose spelling is atrocious).
So much screams Aspergers, and yet she was never diagnosed.