elfin

suggestive of an elf in strangeness and otherworldliness; "thunderbolts quivered with elfin flares of heat lightning"; "the fey quality was there, the ability to see the moon at midday"- John Mason Brown

small and delicate; "she was an elfin creature--graceful and delicate"; "obsessed by things elfin and small"

relating to or made or done by or as if by an elf; "elfin bells"; "all the little creatures joined in the elfin dance"

usually good-naturedly mischievous; "perpetrated a practical joke with elfin delight"; "elvish tricks"