How many Black Knights (Black Wings Generals) are there really?

I want to be female

But yah like it's been said. Trailers present Aran as a female, so do some npc and that anniversary event, but meanwhile some other npcs and cutscenes imply that Aran's a he.

The official and true gender of Aran in game remained as a confusing secret like Crona 1


Reference for Crona from Soul Eater
http://souleater.wikia.com/wiki/Crona