
As far as allegiance goes, best answer would simply be Ul'dah since Endemerrin was (is?) a member of the Immortal Flames. Doesn't have an actual home of his own, so he can't really call any of the city-states "home".
Plus he wasn't even born in Eorzea, so there's nothing to go off as far as nationality is concerned, either.
Plus he wasn't even born in Eorzea, so there's nothing to go off as far as nationality is concerned, either.