Hello. You can do it following this.
Make sure editor data is installed.
Create a new Addon. Select Load data from Story and Target it for Story.
Open level browser. Hit Show Inherited Levels to show levels from main campaign. Find FortJoy. Open it
In World Outliner search for ‘Lohse’
Check out the object using this button
You will be able to edit properties of the character. You are interested in Visual Set Indices
Click inside the field with numbers, there will be a tiny button with 3 dots, click it to edit the property.
There are selectors for different visual properties. You are looking for face type, hair, and colors of those.
Change the settings and don’t forget to save. Also when the window will be closed, don’t forget to hit save the project itself.
Start the game. Go to mods. Activate your mod. Don’t forget to confirm.
Start new campaign. This is our new Lohse.
Meet her in game.