Seeing as how Looma's idea of superiority is less 'composed behavior' and more 'aggressively assert yourself at literally the slightest provocation,' Diya's not exactly a calming influence. Not measurably, anyway. Especially since the princess responds to that by narrowing her eyes at the woman and literally growling at her. Congratulations are clearly in order for the Cetagandans, they've managed to draft the intergalactic problem child.

"I will be finished when the one responsible for this insult lies dead at my feet, human!"

Frankly, the only reason she hasn't gone completely ballistic yet is that she's already discovered she's not as strong as she used to be. How isn't really important, but. It's probably got something to do with why the knuckles of her lower left hand are bloodied. And, now that she's doing her absolute best to continue the usual chest-puffery, also the side of that nice new shirt someone had been kind enough to provide for her.

"You will tell me why I am here and who is responsible. And perhaps I will be so gracious that I will not persuade my father to obliterate this puny planet!"