I completely forgot that she has a joined ending with Tana as well!

Hmhm, that could be and is intriguing.

It might. (Personally I believe that Crimea has a "selected family becomes royal" system.) Though I believe such a huge change would take quite some time and if they don't watch out it might destabilize Renais more (prospective "heir" competing with each other).

Damn it, all this talk makes me crave post-war fic with all those shenanigans.