Her facial features are (still) very masculine... Mouth, chin, nose and eyes, brow, jawline... Her lips make it look like she's pressing them together, the nose looks too big. The length may be fine, but it's too wide.
The shading on the left side looks okay, but on the right side it kinda looks like it's been painted, like David Bowie in the Alladin Sane album cover.
It's a hard face to pixel, I've tried multiple times and failed, so it may take a while to get right. But I would put more time in it to try and make it look like her, because it's such a cool character and goes so well with your Ripley portrait.
As for the body, I think Boraka's thread has a great example of how you could shape that in terms of clusters of colors.
Studying it could help you with the hair too, I guess. Maybe you could bring the ponytail forward and over the shoulder like one of your references? You could then use more colors and define it a bit further.
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EDIT:
There, a bit more feminine.
Smaller nose, thinner neck, fewer expression lines, smoother face and rounder, softer lips.
Smaller eyes and irises, and the little highlight in the eye pointing towards us, which somehow makes it look like she's looking in our direction (yeah, I don't know either).
Before/After:
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Another try. Took it as a personal challenge as you may guess.
I tried to reshape her jaw a bit, and to give her a prouder (?) posture. Didn't fiddle too much with it, though.
The mouth is really, really challenging for me.
Hopefully she didn't get that generic mcgeneric face now.