Quote Originally Posted by Cilia View Post
"Ser" is just an archaic alternate spelling of "Sir," used to sell the idea of Eorzea being old-timey just like the rest of the baroque English script.

The appropriate female equivalent would be "Dame," but lots of fictional works don't bother with that.
Actually Ser is not English at all, it is Italian and was used by notaries & lawyers with an equivalence to Sir in English. It would never be used in England at all. A lot of people think it is to do with gender but that's a modern Internet concept. Simply put, women could never (and technically still can never) use the Sir/Ser honorific.