Okay, Kojima has always had a juvenile aspect to all his games when it comes to women, but Quiet is the first character in this series to make me roll my eyes with pure disgust.
She is literally being horribly tortured with shock rods at Mother Base, and the camera does all it can to focus on her breasts and crotch as much as possible. Same thing happens when life killing salt water is splashed onto her. I thought I was watching a snuff film during that scene.
She "dies" to a soviet soldier in mission 45, the soldier takes then her pants off and is prepared to rape her dead corpse. It's just an excuse to get Quiet into her panties. All so the camera can focus on her ass with slow mo shots every 10 seconds while she murders everyone. The transition from horrifying death/possible rape to sexy bad ass sequence in probably the worst tonal shift I've seen in an MGS game to date.
To top it all off, she's not even all that interesting as a character. She makes for an interesting plot/gameplay device, but I really didn't care when she had to leave Mother Base. She could have been so much more interesting, but we really didn't get anything with her.