It is a critical role that Hades plays in "Antigone" by Sophocles (495 B.C.E. - 405 B.C.E.).
Specifically, Hades is the God of the Underworld of the afterlife. He influences Theban Princess Antigone's decision to respect the divine will over a royal edict. Antigone explains that she will spend far less time in Thebes than in the Underworld. She decides that she therefore must act during life in a way that guarantees her Hades' welcome and a happy reunion with her family in death.