Speculation regarding how Seven would be addressed in StarFleet.

How about Captain Musiker?

I mean obviously StarFleet is cool with no last name I mean it was just Commander Data, Commander Worf etc. but I would not be opposed to picture the scene.

Some new ensign is being taken to meet the Captain. They are nervous but reassured that while Captain Musiker has a reputation it’s all going to be fine. We’re thinking “Raffi is the Captain? Not what was expecting but sweet!” and then it pans to the bridge and Seven turns around. Hey if paperwork demands it, might as well just take the wife’s name 😉

Cue banter on the bridge about how they call her Captain Seven anyway maybe to avoid any confusion re: the Commander I don’t know.

Seven’s all “If I have to surrender myself to the inanities of StarFleet protocol then I will tick all their boxes to ensure we remain together”

And then a little smirk like “done running remember”