In the odyssey who is antagonist?

The primary antagonist in Homer's Odyssey is Odysseus' rival Poseidon, the god of the sea. Poseidon holds a grudge against Odysseus for blinding his son, the cyclops Polyphemus, during Odysseus' earlier adventures recounted in the Illiad. Throughout the Odyssey, Poseidon uses his vast powers over the sea to create storms, shipwreck Odysseus's men, and hinder his journey home. Odysseus must overcome Poseidon's wrath and outwit the challenges he faces to ensure his eventual return to Ithaca and reunion with his family.