I hope you enjoy(ed) my take on Captain (now promoted to General) Phasma!
Ah, just a word on that: Promoting her from captain to general is problematic.
Going off of appearances, Phasma’s an army officer, not a naval one. In the American army, at least, the rank of captain is a relatively low one; it’s one step above 1st lieutenant, four steps behind brigadier general, the lowest ranking general. Were she to receive a promotion, the rank of major or – if you want her to skip a grade – lieutenant colonel would be a more reasonable choice.
On the other hand, if she is a naval officer, then she can’t be a general since there are no generals in the navy. She would be an admiral.