Philoctetes is a Greek warrior who has spent the last ten years marooned on the island of Lemnos. Bitten by a serpent on his way to Troy, he suffers from a festering foot wound that causes him agonizing physical distress. He survives in total isolation using a powerful bow gifted to him by a demigod. Harboring deep resentment toward the Greek commanders who abandoned him, he is fiercely bitter about his unjust exile.

Neoptolemus is a young Grecian warrior and the son of the legendary Achilles. Known for his honorable nature, he arrives on Lemnos under orders from the Greek army to secure a vital weapon for the war effort. He faces a profound moral dilemma, struggling to reconcile his inherent honesty with the deceptive military directives he receives from his superior officer.

Odysseus is a high-ranking Greek commander who played a central role in marooning his fellow soldier ten years prior. Driven entirely by a military prophecy, he views deception as a valid and necessary tool for victory. He prioritizes the collective success of the Greek army over individual morality or the suffering of his former comrades.

The Chorus consists of loyal Grecian warriors who serve under military command during the expedition. They actively participate in the landing party seeking to retrieve a vital weapon for the war effort. While they follow orders to aid in the deception, they show genuine sympathy for the outcast's agonizing isolation upon arriving at his cave.

Heracles is a legendary demigod and a close former comrade of the marooned warrior. Before ascending to godhood, he gave his invincible bow away as a reward for the lighting of his funeral pyre. His influence establishes a standard of loyalty and divine favor early in the narrative.

A subordinate soldier in the Greek army who works directly for the high commanders. He takes on the false identity of a sea trader to deliver fabricated news. His disguise serves as a critical mechanism to pressure the isolated warrior into leaving the island.

Achilles is a deceased Grecian warrior universally acknowledged as the best of the Greeks. Though he does not appear on stage, his legacy heavily influences his descendants. His reputation establishes a standard of absolute virtue that drives the primary moral conflict.