The way King Karl wanted to humiliate Princess Ievna in front of the guests present in the great hall was too obvious. Without telling the princess beforehand, he asked the princess to make a speech in front of everyone.
Perhaps he did not expect that the girl would be able to open her mouth confidently in front of people who were no different than strangers to her. The girl had not been able to see the world for the past fourteen years, so perhaps the king thought that the girl would be afraid to just lift her chin when she was the center of attention.
The red-haired girl did look shocked when she had just heard the king's orders, but a few seconds later, she could confidently make a statement that shocked everyone. It was like a counter-attack from the princess.