My wife has a Cressi travel-style BCD (no rigid part, very light), which I often use without problems. Conversely she often uses my plastic backplate+wing. We did never find a significant difference in devices for males or females, regarding a BCD.
It is just matter on how much they embrace the upper part of your chest: both my wife's BCD and my BP+WING do not embrace it at all, so they are both "unisex".
Said that, the Ladyhawk is also a BCD which does not embrace your chest, I love this, and so I suppose you will be happy with it.
Regarding the Air-2: it is a nice additional device to have, which can save your butt in some situation. I would keep it. However, it does NOT replace a second regulator (with properly long hose), which is mandatory in many situations.
Furthermore, I warn you against a cheap, low performances octopus.
For me the primary and secondary regulators should always be identical and with very good performances. In the rare case you or your buddy need to use the secondary one, both of your are already in trouble, and so you want to get a reg which works great, not "so-so".
Said that, also evaluate to have a COMPLETE secondary reg (as both I, my wife and our two sons have). So two first stages and two second stages. When doing serious dives, usually you will rent (or own) a tank much bigger than a crap AL80, equipped with two independent valves and posts, usually with DIN connection, and possibly manifolded or truly independent (a back mounted twin tank or two separate side-mounted tanks).
In all these cases you must have two first stages. In cases you only get tanks equipped which a single valve (which I find a bit unsafe, but is some places tanks with doubles valves are difficult to find), then you will mount the secondary second stage on the same first stage as the primary one. It takes less than one minute to detach the hose from one and to attach it to the other. This of course is feasible ONLY with DIN mount, a single first stage with yoke mount is very easy to fail, because with a yoke mount the O-ring is exposed and can break easily, also during the dive.
So, try this setup with the Air2, and if it fits your body, go for it, not caring that usually it is sold to female divers. But do not rely on just the Air2 as your secondary air source, you need a true regulator, possibly identical to the main one, and possibly with his own first stage.