I don't know how the raws are gonna go, but I'm hoping that she doesn't end up with the first prince. I could see it working with her as his Minister of War and the Army (she would truly flourish there) but not as a romantic partner. Their point of views on the world are too similar for the relationship to have the foundations it needs to work.
I kind of like the idea of her ending up with the knight that worked undercover with the second prince. He seems sweet and respectful, without the manipulative tendencies that could ruin the relationship.