Hermes was the Greek god of travellers, messengers, boundaries, trade and cunning. He acts as a guide between worlds, protects travellers and thieves, and frequently assists heroes through negotiation or deception.
The Homeric Hymn to Hermes presents him as a precocious inventor and trickster who steals Apollo’s cattle and creates the lyre. His role as herald and psychopomp made him one of the most versatile gods in Greek and later Roman religious culture, where he was identified with Mercury.
Homer’s The Iliad gives Hermes a decisive late role when he guides the aged Priam safely through the Greek camp to Achilles so that the Trojan king can ransom Hector’s body. In The Odyssey, Hermes acts repeatedly as a divine intermediary: he gives Odysseus the herb moly against Circe’s magic and later carries Zeus’s order to Calypso that the long-detained hero must finally be allowed to leave her island.