King of Scotland
His victories have made him a popular king
When Macbeth initially decides not to kill the king, he gives Duncan's many qualities as his reasons
He names his eldest son—Malcolm—as his heir
He dies at the hands of Macbeth, disrupting the Chain of Being or Natural Order
Too trusting—his trust in the original Thane of Cawdor was betrayed, as was his trust in Macbeth