The all black seems very masculine to me. Plus, I have never seen a girl who wears her hair like the Main does.
I think the face should be hidden like in Halo and Metroid. All the views of the Hero should be when he has a hood on. That way a shadow always covers the face. If the character is voiced, then it should be a voice of a young boy, so it seems the voice could come from either a young boy or from a girl.