When the King of Heroes, bathed in the rays of morning light that streamed in through the windows, reached that point, he turned his gaze to Tine. Perhaps she was using some form of magecraft, because she was wide awake and tense despite not having had a wink of sleep.
“I permit you to retire,” the King of Heroes addressed Tine in tones of mild displeasure. “You were born human; be natural when answering the demands of your instincts.” His words were of appreciation for a subordinate and stopped just short of saying that he saw through her spell.

Fate/Strange Fake: Volume 4, Chapter 10 ("Day 2")