elfin
adjective(elf-in)
suggestive of an elf in strangeness and otherworldliness
Examples:
Thunderbolts quivered with elfin flares of heat lightning. 
elfin
adjective(elf-in)
small and delicate
Examples:
She was an elfin creature--graceful and delicate. 
Obsessed by things elfin and small. 
elfin
adjective(elf-in)
usually good-naturedly mischievous
Examples:
Perpetrated a practical joke with elfin delight. 
elfin
(elf-in)
relating to or made or done by or as if by an elf
Examples:
Elfin bells. 
All the little creatures joined in the elfin dance.