Top picture:
First thing I noticed is that her chin is really pointy. Looking at the anatomy behind that, she wouldn't even have room for her bottom teeth. Yes, yes, this is anime, but most anime at least allows for some sort of semirealistic skull. Moving down, her boobs shouldn't be pressed together like that if she's leaning over unless her top is really constricting. From the way it's drawn, I take it it's not. They should be slightly lower and a bit looser.
Sort of like this.
Also, I can't critique all of them exactly, but grab a reference photo of a person wearing the same type of clothing as you want your character wearing. Ink in the more prominent folds using your reference. As it is, it looks like you know where the folds should go, but aren't hitting the right look for them.
Bottom picture:
Her face isn't too far up, I don't think. If you were going for realism, that'd be closer to what you'd want. As it is, I think what you're seeing as awkward may be the way her human face and hair contrast with a mannequin's body.
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