There are several potential marriage partners in Mistwinter Bay. In fact, every character - except Ophelia, Jacques and Sophia - is a potential spouse! The marriage and dating feature is not fully implemented yet, since the game is in a pre-demo state, but all the demo characters can be "dated" (via so called hang out events, where the player gets to know the character better) to the second hang out event out of five.
One of the characters who it is possible to date and who also happens to be a foreign leader is Camilla Larmassier, President of The Republic of Meblia. Meblia is Straena's sister country and mainly consists of humans. Extravagant and eccentric ones, generally.
Camilla serves a 10-year-term as a democratically selected President in Meblia. She can come off as a superficial woman, only caring about appearances, but she is a lot sharper than she lets on. Although, there's no denying that she loves all types of parties and wine. She may be a marriage candidate to the player, but the player should be aware of the fact that she is already married to three people. Polygamy is legal in Meblia.