I'm sold, mostly, would just like to put some limitations and clarifications:

-The king and his direct lineage died during the revolution, your characters would be cousins, kinsmen that fled and that are claiming the throne.
-The religion you represent is the main one of the country, but it doesn't originate from Noravea and the head of the church is also not the king and is foreign from the country (this may come with advantages and inconvenient as we go.).
-Laurentia allows you to use their border freely to import material, gives you some weapons and equipment that can't be traced to them and doesn't deny your claims, but neither does it confirm them. Laurentia wants to make sure you're the winner before it places its bets publicly.
-The Capital, which might have changed name, was Concordia.

If this sounds good, you have my benediction.