Aldonza is a strong-willed serving woman who initially views herself cynically, but is transformed through Don Quixote's vision of her as Dulcinea, a noble lady. Her journey with Don Quixote leads her to embrace his ideals and take up his mission.

The Manservant assists Cervantes in orchestrating the play within the prison, echoing Sancho's supportive role to Don Quixote as a loyal yet simple companion. Sancho adds humor and reality to Quixote's adventures, often finding himself charmed by the knight's quests.

The Duke, a skeptical prisoner, plays the role of Dr. Carrasco, a practical, science-minded antagonist who seeks to cure Don Quixote of his delusions. He embodies a critical realist viewpoint, resistant to idealism.

The Governor is a prisoner with authority who fairly considers Cervantes's defense; he plays the Innkeeper in the inner play. As the Innkeeper, he humorously indulges Don Quixote’s whims while maintaining a genial control over his establishment.

The Padre is a priest caught between admiration and pity for Don Quixote, seeking a balance between idealism and realism. He contributes a nuanced perspective on dreams and reality, reflecting conflicts within the household of Don Quixote.

Pedro leads a group of muleteers who provide the ensemble of rough men occupying the inn, focused largely on base desires. They contrast Don Quixote's idealism with their crude demeanor and actions.