Final answer:
Prince Prospero in 'The Masque of the Red Death' reacts to the uninvited guest with initial outrage, an attempt at control, and eventual terror, leading to his confrontation with the guest and subsequent death.
Step-by-step explanation:
The question relates to Prince Prospero's reaction upon encountering the uninvited guest in Edgar Allan Poe's short story The Masque of the Red Death. In the narrative, Prince Prospero reacts with outrage and demands the intruder be seized. However, his reaction also includes a deep-seated fear as none of his guests are willing to apprehend the mysterious figure dressed as a victim of the Red Death.
Finally overcome with terror and anger, the prince decides to confront the guest himself, an act which leads to his own demise. Thus, the prince's response is a complex mixture of authoritarian control, denial, and ultimately, fear.