Not Actually Me
Multiple guns are in order for her. My first order of business though is to make sure she can feasibly produce a weapon from her person no matter what she's wearing. That Deen Adams form fitting thigh holster thing looks like it can be pulled off even in a reasonably short skirt or form hugging dress.I'm gonna go with semi-auto, compact or carry size, and probably 9mm in a pancake belt holster at 4 o'clock. Glock 19 most likely. If she's a metal kinda gal, Sig P229 or maybe a P239, though the capacity suffers. S&W M&P9c or Springfield XDm might sub for the glock. A commander length 1911 in 9mm or .45 might replace the Sig. Cover jacket sized to conceal the gun.
She's going to have more than one gun. I'd guess four. She'll have a duty sized weapon that will be whatever she carried in the service as a nightstand gun. Probably a pocket/deep cover gun, which could be a lot of things. First bet is a S&W airweight snubby in .38spl. A Ruger LCR in .327 would be my choice, but she's going to want to stick with what she knows, and the Military doesn't do Ruger, even back when they had revolvers. She may also stick with semi auto, so a small polymer framed .380, like a M&P Bodyguard or a Beretta Pico. Or, if you really want to be cliche', a Beretta Tomcat .32acp in a garter belt. Third additional gun is probably a Remmington 870 express/Mossberg 500/ AR-15 in the trunk.
Sounds like a fun gal, when do we get to meet her?
Meeting her...easier said than done.