Here are the sliders I use for my young Andreja.

check out my Andreja Younger Voice mod. it changes all her dialogue audio to younger voice, there's 2 pitch versions.

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***ENSURE YOU USE PROFILE 37 BEFORE EDITING THE SLIDERS
***YES, 37 is a male but switch body type from 1 to 2 and then adjusting sliders will result in the Andreja you see in the images
***Each profile/preset is the bone structure and the following sliders are just fine tuning the bone structure.

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images are all in the archive you can download but you can also look through the images if you don't want to download

long story short, i edit my character with SLM PLAYER and then i capp (paste) my look onto Sarah Morgan

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***MODS USED TO GET THE EXACT SAME LOOK

High-Res Hair and Beards (optional, but just crisps up the hair textures)

High-Res Eyes and Brows (ONLY the eyebrow files -- necessary as the eyebrows are wayyyyy nicer than vanilla)

The Eyes of Beauty (necessary to get the same eyes)

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INSTRUCTIONS
(i'm sure there's easier/better way but this is what i do since i'm used to it)

Here's what I did to modify Sarah, and pretty much all my companions/crew.

This method does involve editing your own looks and copy/pasting it onto an npc.

you will lose your player's look so if you want to save it, go transfer it onto some rando npc to pull from after

your companion will also lose their original look to, so if you want to keep that to switch back to later, go transfer it onto some rando npc to pull from after

and by rando npc, i'm referring to an npc that you know doesn't disappear and can pull from later on down the line

• open console with ~ and type in "slm player" (no quotation marks)
• face editor will then come up
• edit your player's build, face and hair, and whatnot. in this preset's case, use profile 37!!
• (i'm pretty sure build transfers onto companion from my testing, but I may be wrong idk)
• after finishing sliders confirm and exit player edit.
  

• go into third person view where you can see both yourself and companion at the same time on screen
• open console, left click on your character so id comes up, and then type in "this" (without quotations of course)
• (the this command will pull id and show it in console for use later, my id shows up as 00000014)
• when your player id shows up in console, left click on your companion, make sure it says something like NPC Sarah Morgan 00654324 EP or whatever
• (scroll wheel will switch between ID's but you may have to exit and go outside. if inside a building or ship, clicking doesn't work for me to properly show NPC 65406546 EP)
• once you click on companion and it shows their id on screen, while making sure their id is still showing on screen, in console type "capp" plus your character's id
• so for example, it'll look like this "capp 00000014" or something
• after pressing enter, your edited look should now be on your companion and should stick there for the forseeable future, my companions haven't changed even after i restarted game and pc a few times.