@Red225 A monarch is only a monarch and long as he/she can keep themselves on the throne. It requires eliminating both enemies within and outside of the country. Since they already know a demon lord is appearing shortly after, they would love to use Eumiella to fight the demon lord. She has basically no connection to the royal family as well (or anybody, for that matter), no royal resources have been invested in training her, so even if she happened to die in the process, it would be no big loss. However, if there was no demon lord appearing, they would most certainly consider the good and bad sides of trying to poison or otherwise remove Eumiella. An unreadable person without clear ambitions can be far more dangerous than a simpleton who makes it readily obvious what they want. They would never know what Eumiella could do one day or who else might be approaching her, perhaps with more luck.
@Awsim I guess that's why they are and can remain as the king and the queen.
@feha Huh, why? It's the total opposite. They don't want idiots reposting this on Instagram to avoid copyright troubles, I believe. It's asking less attention, not more attention.