Duality of Human Nature

Characters embody contrasting traits, such as the villain's charm and brutality, or Don Luis's criminal past and heroic present, emphasizing the coexistence of good and evil within individuals.

Florence's beautiful appearance contrasts with her murderous actions, reflecting inner evil.

The contrast between the apparent guilt of Sauverand and Marie Fauville and Perenna's belief in their innocence highlights the theme of hidden truths and dual aspects of character.