After Criona used her magical power to look at Skraal with the intent of inspecting, she knew that she or her friends had no chance against this man. This man completely outclassed them not only in magical capability but also in demeanor.
Criona understands that she was about to die if she was not warned by her friend.
They may be from the Cursed Organization, which is most likely the strongest dark-mage organization, and they may be arrogant towards many other mages, but they are still capable of knowing what is right and wrong, and on top of that, they are smart people; they understand if a person is untouchable by them or not.
Criona again looked at the Skraal and spoke.
"I am sorry to bother you."
After she said her words, she did not even look at the Skraal anymore and just turned her head to the table and ordered food.
Edited