So the first princess is enough of an imbevile to sacrifice a very strong person just to ease her jealousy? Even if she wants to kill the MC in an "accident " only after the battle is won, the thing about wars and battles is that they always happen again especially is historical setting, people were basically always on war so she is prepared to not have a strong person be there the next time this happens and possibly risk losing everything simply because of her jealously. And it's even stupid jealousy because the guy never looked her way even when the MC was not there. What a farce .