The ranks are trainee < patrol officer < senior officer < blackcoat

Senior officers can be rewarded card titles for special merits. Blackcoats have card titles by default; they’re Aces and Kings/Queens of the deck.

With a card title you get some fancy benefits (though I haven’t decided all of them yet). A personal office room in the HQ is one.

Can’t remember why I went with the card idea originally, but I was interested in card symbolism at some point and I guess it’s just cooler for a famous officer to have a nickname to go by. Ace of Spades is commonly known as the “death card” so there you have it, hahaha :-D