Not really. It could be. Canon doesn't specify anything in that area (in fact we get precious little to work with for *any* character), but this is actually a complicated point.

See, that person (I gather you don't want to spoil anyone reading the comments here? I'll try to keep it spoiler free.) is genderqueer as far as Aja (bookshop) is concerned, what with the blonde in the dress and everything, and Aja's opinion tends to be influential (I say that as one of her closest friends.). Many people take what she says more or less as gospel, others deliberately go in the opposite direction. I haven't seen the genderqueer debate anywhere else except on her LJ/DW and in reaction to her.
But I'm not really involved in Inception fandom right now, so ... ymmv.