WordOfTheDay/Duende

 [A]) having soul
 [B]) a combination of grace, style and bravado
 [C]) dark magic
 [D]) Dionysian link to Chaos, Earth and Death worship
 E) all the above

In Spanish, according to the DRAE, it's a mythical spirit which is said to live in some houses and which causes mild illness and loud noises in them. In traditional narratives it appears with the figure of an old man or a child. --PT

And in English, according to the OED, it means apparently either an evil spirit or 'inspiration'. The citations seem to imply that the Spanish use has been transferred from 'ghost' to 'emotional intensity' in much the same way is 'spirit' (as in 'that dancer has spirit'). The stuff about 'dark magic' and 'Chaos, Earth and Devil worship' looks like (to use the technical term) so much bollocks it's as untrue as a Liberal Democrat election leaflet.

Does this answer the question?