I can see the general gist of the plot but I don't really understand the MC or her role in this... like yes, she's raising the Prince and she has sympathy for the Queen and she dislikes the King/Yurigel for being so cruel to the Queen, but in so far she's basically done nothing. She's got an incredibly passive position and while she may have more power when the Prince grows more that will be the Prince's power and her slight influence on him if she has any, I really don't understand where the story will go... I mean, I do like it, and I like the way she holds herself. A realist MC that accepts the situation and simply wants to do her job and live peacefully, she's not here to change the world or berate the King, she's just handling the Prince and might help some of the stronger characters (like the PTSD mage) but that's it.
Not to say it's boring or anything, but it's... very different.