So here's my Second vault girl save file. My first one is obsolete for the time being since the hairstyle mod used in it has been taken down for now.
She's placed right before the elevator up to the surface so you can edit any of her looks how you like!
Just place the file in your Save game folder.
Usually: C:\Users\'your user name'\Documents\My Games\Fallout4\Saves

You will need these mods to make this work properly:
Ponytail Hairstyles - v1_2a
Valkyr Face Texture
Vivid Hair Colors
deLuxe - Lip Liner Mask
True Eyes - Saturated Soft Lashes