Tried it in the editor it seems that editor has a little bug while copying troops. it ignores skin value.
Don't bother, i figured it out. I created a male camp defender copy. Added 1 to the party. Appeared in the alley quest with me as male. Good. Saved and quitted. Opened the editor, changed it to female. Opened the game and the saved game. It's male. Started a new game. In the alley fight it is female. It seems troop skin is stored in the save file and overwrites what's read from the troops.txt file.
You need to create a new game or use this
saved game editor it may edit troop skins. I never used it before.