Ok, people commenting that Marie's gift is too overpower and she wouldn't able to do anything by herself. Well, first of all the reason she's able to solve the diplomatic problems is because she's well educated (of course her gift does help her but she's come up with the idea on her own based on the book she's read)
At first, it's true that her gift is overpower ike how she could composes a song when she never done that before but not anymore.
In one of the chapter, Marie said that her dream became more and more blury and also she doesn't frequently dreams anymore, so that's why in that chapter she's questioning about what would happen if she didn't dream anymore and what would happen to the talents that comes from her gift... Her monologue didn't get finised because the day after that, she got a blury and short dream.
Soo conclusion HER GIFT DIDN'T OVERPOWER, THEY ALREADY BECAME MORE BLURY AND SHE'S NOT FREQUENTLY DREAM ANYMORE LIKE HOW IT'S STATED IN ONE OF THE CHAPTER.
SHE CAN SOLVE THE DIPLOMATIC PROBLEMS MOSTLY BECAUSE OF HER KNOWLEDGE FROM HER HOBBIES WHEN SHE LIVE AS A PRINCESS WHICH IS READING.
p.s: her idea sounds stupid? It is to good to be true and impossible she would have a perfect idea? Well dude what you expect from a "story" especially a story that emphasizing the MC who has power 🤡