I can't say that I am winded from running , or set out with any spring in my legs either -- no sir, I was lost in thought, and it made me stop, often dead in my tracks, wheeling, turning back, and all the time a voice inside me muttering, "Idiot, why? You're going straight to your death." Then muttering, "Stopped again, poor fool? If somebody gets the news to Creon first, what's to save your neck?" (1.249-256)
How does the Sentry's monologue serve to characterize Creon?