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I don't see anything wrong with it, really... except for the oddity.
If you want to keep the character concept intact, don't go and get a yamatai citizenship: they'd give you free access to a female yamataian body with probably just a giggle or some eyerolling, meaning the whole concept of the character would be doused. ~_^
Well, you'd need to use a character someplace, really.
Maybe on a civilian ship like the Yggsdrasil if you can arrange something with MM007... or try to either get some story running on Nepleslia (there's a guy, Shaun, over there, I believe) or try to get included on the NSS Alliance. How? I have no idea ^_^;;