[Ultragunner]

Spoiler for about Oboro:

Well, Oboro IS Kuon's uncle

IIRC in the game, Hakuoro entrusted Tusukuru to Oboro before going to his slumber, Oboro in turn left the country to Benawi and took Yuzuha's child (Kuon) to go on a journey

But now it can assumed that Oboro had returned years before this new series began (Kuon got to be raised by all the heroines after all). I would say Kuon is indeed the Crown Princess of Tusukuru, and Oboro has been acting as the ruler awaiting her return