fey

1. ADJ 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. 害羞、幼稚或难以预测的; 不自然的或不诚恳的[文学性]

Her fey charm and eccentric ways were legendary. 她让人捉摸不定的魅力和无厘头的作风是个传奇。