So do you have a family tree in mind?

I may drop the Dragon part and just go with 60% Tyro - 40% Oro, perhaps one of the Cousins who's parents were married into the Oro side in an attempt to strengthen relations. I'd imagine him as part of the royalty on both sides of the kingdom, but never quite able to take the throne on either side due to the way lineages work so he's a diplomat or something for either the Tyro side or Oro side.