An impish fear clutched my hand, so that I could not write any more that day.
She wore an impish look, high cheekbones and the only lavender eyes Dean had ever seen.
The primary attitude of man to the numina seems clearly to be one of fear, which survives prominently in the "impish" character of certain of the spirits of the countryside, such as Faunus and Inuus, and is always seen in the underlying conception of religio, a sense of awe in the presence of a superhuman power.
Fairies can be associated with angels, or they can be seen as more impish creatures similar to goblins and pixies.
No, not Titania, but rather Puck from A Midsummer Night's Dream, who is very impish.