Is Odysseus a main character in The Iliad?

No, Odysseus is not a main character in "The Iliad." While he plays a significant supporting role and is one of the key Greek warriors in the Trojan War, the primary focus of the epic is on Achilles and his conflict with Agamemnon. Odysseus's character is more prominently featured in "The Odyssey," which follows his journey home after the war.