The power to attract through personal magnetism or charm.
1) Even as a child, she had an unmistakable duende that attracted the attention of passersby.
2) The boy persuades a great number of people by his duende.
Spanish dialect, charm, from Spanish, ghost, goblin, probably from duen de casa which means 'owner of a house'.
allure, appeal, attractiveness, charm, enchantment, glamour, seductiveness, witchery