In the context of dramatic literature, soliloquies and asides are pivotal devices that provide insight into character motivations and thematic depth. Consider a scene from Tennessee Williams' A Streetcar Named Desire, where Blanche DuBois often reflects on her past through soliloquies, revealing her inner turmoil and desperation. In this play, her soliloquies contrast sharply with her interactions with other characters, illustrating the duality of her existence in both reality and illusion.
How does the use of these devices enhance the audience's understanding of Blanche's character and the overarching themes of illusion versus reality?