Conflict and Tension: Sentry's presence creates conflict and tension within the play. As the guardian of the palace, he poses a threat to Antigone and Ismene, who are determined to bury Polyneices despite Creon's decree. This conflict drives the plot forward and keeps the audience engaged.
Symbolism and Metaphor: Sentry represents the forces of authority, law, and social order that Antigone challenges. He embodies the rigidity and inflexibility of the state, contrasting with Antigone's principles of justice and familial love.
Ethical Dilemmas: Sentry's interactions with Antigone raise ethical dilemmas about the moral obligations of citizens versus the demands of the state. His insistence on enforcing Creon's law highlights the tension between personal conscience and external authority.
Foil to Antigone: Sentry serves as a foil to Antigone, emphasizing her strength, courage, and determination. His fear and reluctance to carry out Creon's orders underscore Antigone's unwavering commitment to her beliefs, making her character even more heroic and admirable.
Representation of Creon's Power: Sentry's loyalty to Creon and his willingness to enforce his decrees, even at the cost of his own discomfort and potential punishment, demonstrate the extent of Creon's power and the pervasiveness of his influence.
Catharsis and Tragic Irony: Sentry's role contributes to the catharsis and tragic irony of the play. His actions indirectly lead to the tragic downfall of Antigone, Creon, and their families, evoking a sense of pity and terror in the audience.