Final answer:
Victor's reaction to Kirwin announcing a visitor is fear, as he suspects an enemy. This reflects the tension in Mary Shelley's 'Frankenstein', where Victor is often in distress due to his creation.
Step-by-step explanation:
When Kirwin tells Victor he has a visitor, his reaction is one of fear; he suspects an enemy. This question is derived from Mary Shelley's novel Frankenstein, where Victor Frankenstein finds himself in distress, fearing that his creation might be pursuing him or that some misfortune is about to unfold. Characters in literature often exhibit strong emotional reactions to visitors based on their circumstances and the narrative tension at that point in the story.