elfin

adjective

1. suggestive of an elf in strangeness and otherworldliness"thunderbolts quivered with elfin flares of heat lightning"
2. small and delicate"she was an elfin creature — graceful and delicate"
3. relating to or made or done by or as if by an elf"elfin bells"
4. usually good-naturedly mischievous"perpetrated a practical joke with elfin delight"