Elfish

(a.) of or relating to the elves; elflike; implike; weird; scarcely human; mischievous, as though caused by elves.

Thesaurus Entries

arch, devilish, elfin, elflike, elvish, faery, fairy, fairyish, fairylike, fay, foolish, full of mischief, gnomelike, gnomish, high-spirited, impish, knavish, mischief-loving, mischievous, pixieish, playful, prankish, pranksome, pranky, puckish, roguish, scampish, scapegrace, sportive, sylphidine, sylphine, sylphish, sylphlike, sylphy, trickish, tricksy, waggish