"It is what people would call a 'noble bearing' or 'air of nobility'." Reinforce picks two of the more common phrasings. "Those who are raised to lead, with the expectation of absolute power, behave differently. When it is combined with the trappings of courtly protocol it is very noticeable."

It was a textbook explanation, suitable to her nature. And as for her personally...

"I have served many lords, so it is especially recognizable for me."