Garlean Third Eye Customization option

[Ameela]

And male Miqo'te are loners who rarely leave the tribe.

And male Viera are solitary forest wardens who seldom interact with anyone except to raise other young male Viera, or to breed.

Player characters break the rules all the time.

To be fair, all of these are lore tidbits which aren't really made a big deal out of in the game itself, like no one ever questions why Erenville or G'raha Tia would be in Sharlayan.
By contrast every time a supporting character turns out to be a Garlean like Cid or Lucia it's always presented as a big reveal and they're treated differently for it by the game's writing as well as in their interactions with the Empire so the transition might not be as seamless for player characters. After all there's more than a handful of voiced lines where you're referred to as an Eorzean by imperials.