What are Basque ghosts like?

Do ghosts prefer southerly winds? Are Mediterranean ghosts calmer? They say that in Northern Europe ghosts are loud, horrifying, that their shrieks are more out of tune because of the cold. With Northern ghosts — Irish, Estonian, German, it's easy to imagine them coming at you with a knife and no explanation. Mediterranean ghosts, however, are not as gloomy, it's impossible to take them too seriously; even when they kill you, they do it in an incompetent way; Don Juan Tenorio and others like him are laughable, buffoonish, and sometime it's their own comedic candor that makes them all the more fearful; we'd risk our necks to bet that they'd rather dance to a tambourine than use a knife; Mediterranean ghosts sound like they'd be fun to have a few glasses of wine with. "Ghosts fervid for Frescuelo and Maria. "Is there a really frightening and serious ghost in Spanish literature? And in the Basque Country? Who are they? What are Basque ghosts like?

— from Twist, by Harkaitz Cano.