Kojima's going to get raked over the coals for his misogyny with MGSV, and he
absolutely deserves it. He's got way worse over the years. What started with a 'teehee, Meryl in her undies' easter egg in MGS1 evolved into Naomi spending all of MGS4 with her shirt open to her navel, Mei Ling being nothing but an arse on legs, Rose's Sixaxis boob-jiggling, the B&B Corps' grossness, Meryl's story being wrapped up with a pseudo-Snake wedding, Peace Walker's X-ray cutscenes, Paz in her knickers for no reason, Paz's rape, Paz's vagina bomb, etc.
Does anyone honestly think Kojima's going to provide a good reason for why Quiet is what she is? It's going to be another aristocrats joke like all Drebin's stories about the B&B Corps, because isn't war so terrible? I'm sure she totally needs big tits with jiggle physics and some torn-up lingerie because of story reasons.
At least it looks like you'll actually be able to put some clothes on the poor girl in-game (her current outfit is set to 'Naked', of course):