A Fury who assumes a significant role, she is a monstrous avenger of familial sins and becomes an embodied force of chaos. Her actions, backed by Oedipus's curse, challenge the authority of the Olympian deities.

One of Oedipus's sons who becomes the main antagonist, Eteocles retains the throne of Thebes against his brother, Polynices. His refusal to relinquish power for a peaceful transition escalates the conflict.

The brother of Eteocles, Polynices is initially exiled and portrayed with more noble characteristics. His intentions to reclaim the throne set the stage for the larger conflict within the narrative.

An exile and fierce warrior from Calydon, Tydeus becomes Polynices's loyal ally and friend. He is characterized by his hot-headedness and martial prowess, heavily involved in the unfolding battles.

The elderly and wise king of Inachus who leads the Seven against Thebes, Adrastus seeks to unite the houses of Thebes and Argos peacefully. His role often mediates conflict, though with mixed success.