It's not common for women to be part of the Rangers, though I don't really see a reason why to make an exception. There would have to be some kind of explanation for it in the character's biography, though. As for the towns, think a little more medieval, ancient Greece. There's no need for crèches, as there's enough time for the parents to take care of their children. If not, a neighbor would be willing to look after them. As for kitchens, I would imagine that every citizen is able to live comfortably enough not to have to go to a communal kitchen. If you're looking for avenues of interaction with other citizens, think more along the lines of parks and the harbor. A city on the coast is usually centered around it's harbor, unless there's something else of great importance in that town (I can't really think of anything at this time), as fishing is a rather important part of the country's economy.
The harbor mistress would most likely move into a different house, perhaps one close by the harbor itself in order to be close to her office. Thule doesn't have classes other than the ruling family though, so an exceptionally large house would be frowned upon. As for pets, I would imagine dogs and cats are the norm, but wilder animals wouldn't be allowed as domesticated animals.
If you have other questions, I'd be happy to try and answer them!