Isabella

Princess of Sicily, in love with Robert le Diable, but promised in marriage to the prince of Granaʹda, who challenged Robert to mortal combat. Robert was allured from the combat by his fiend-father, but when Alice told him that Isabella “the princess is waiting for him at the altar,” a struggle took place between Bertram and Alice, the one trying to drag the duke to the infernal regions, and the other trying to win him to the ways of virtue. Alice prevailed, but the audience is not informed whether Robert married Isabella or not. (Meycrbeer’s opera, Robert il Diavolo.)