[With everyone else, there would be that slight raise of her eyebrow that's more effective than any verbal reprimand about the lack of formality, but with Yuuki, she hardly even pays it attention, instead motioning with her hand for her to stand up, at the same time acknowledging the show of respect, something that is expected even of the Princess.]
Surely you've noticed the recent weakening of our boundaries? With the meeting so close, we cannot afford to let any... trespassers in this land.