ADJ-GRADED 忸怩的;幼稚的;神经兮兮的 If you describe someone as fey, you mean that they behave in a shy, childish, or unpredictable way, and you are often suggesting that this is unnatural or insincere. 忸怩的;幼稚的;神经兮兮的 [literary]
They are no longer anything like as fey and reserved as they once were.