Macduff is a key character in William Shakespeare's play, Macbeth. He is a nobleman of Scotland and the Thane of Fife, known for his loyalty and bravery. Macduff becomes suspicious of Macbeth's rise to power and ultimately seeks to confront him after the murder of his family. Driven by a desire for justice, Macduff plays a crucial role in the downfall of Macbeth. He is the one who ultimately kills Macbeth in battle, fulfilling the prophecy that states no man born of a woman can harm him. Macduff's actions highlight themes of loyalty, revenge, and the struggle between good and evil.