Dionyza enters Pericles as a woman of means and apparent warmth—she and her husband Cleon welcome the shipwrecked Pericles to Tarsus with kindness during their city’s famine. Yet beneath her courtesy lies a woman consumed by ambition and poisoned by envy. When Pericles leaves his infant daughter Marina in her care, she accepts the charge with grace. But as Marina grows into a woman of extraordinary beauty, talent, and virtue, Dionyza’s gratitude curdles into murderous resentment. Marina’s accomplishments in music, needlework, and learning eclipse those of Dionyza’s own daughter, Philoten. Rather than celebrating the girl she has raised, Dionyza sees Marina as a threat to her family’s status and her daughter’s marriage prospects.
The turning point comes when Dionyza’s envy metastasizes into action. She hires the hired assassin Leonine to murder Marina, hoping to rid herself of the beautiful rival who has overshadowed her own child. When Marina narrowly escapes death—rescued by pirates before Leonine can strike—Dionyza does not despair. Instead, she doubles down on her deception. She erects a monument to Marina’s supposed death and lies to Pericles about his daughter’s fate, claiming she died of sickness while under Cleon’s care. Her corruption is complete: she has become not just a murderer in intent, but a liar who uses her position of trust to perpetrate the crime.
What makes Dionyza particularly chilling is her refusal to accept responsibility. When Cleon expresses horror at what she has done, calling her a harpy who uses an angel’s face to betray with an eagle’s talons, she turns his moral qualms back on him. She justifies her actions as a mother’s love for her own daughter, twisting maternal devotion into an excuse for evil. By the play’s end, when Pericles learns the truth and his rage turns Tarsus’s citizens against Cleon and his wife, they are burned in their palace—a fate that seems, even to the play’s moral framework, fitting punishment for those who would poison hospitality with envy and transform a home of refuge into a place of murder.