Antinous, a key antagonist in Homer’s Odyssey, is the arrogant and ruthless leader of Penelope's suitors. Known for his cruelty, greed, and disregard for justice, he exploits Odysseus' household, plots to kill Telemachus, and shows no respect for the gods or the rules of hospitality. His pride and ambition ultimately lead to his death when Odysseus returns to Ithaca and kills him, marking the beginning of the suitors' downfall. Antinous embodies hubris and lawlessness throughout the epic.