Macduff
Macduff is the play's instrument of justice — the man the witches' prophecy has, unknowingly to him, reserved for the specific task of ending Macbeth. His personal devastation transforms political opposition into something irreversible, and his final confrontation with Macbeth closes the play's central argument about the cost of unchecked ambition.
Appears In
Biography
Macduff is the Thane of Fife, a Scottish nobleman who discovers Duncan's murdered body in Act II and whose suspicion of Macbeth is immediate and unspoken. He declines to attend Macbeth's coronation and flees to England to join Malcolm in raising an army — a decision taken without warning his wife or bringing her with him. That omission is the play's most uncomfortable question about an otherwise admirable man, and Malcolm challenges him on it directly.
While Macduff is in England, Macbeth orders the massacre of everyone in his castle. The news arrives in Act IV in one of Shakespeare's most devastating scenes: Macduff absorbing the information in short, disbelieving questions, each answer worse than the last, before the grief settles into something colder and more purposeful. 'He has no children' — the line is aimed at Macbeth, and it measures in four words both the loss and the impossibility of proportionate revenge.
In the final act, Macduff has one purpose. The witches' apparition warned Macbeth to beware him, and Macbeth's false confidence — that no man of woman born can harm him — is dismantled by Macduff's revelation that he was 'from his mother's womb untimely ripped.' He kills Macbeth and carries his head to Malcolm. The personal and the political are, in this moment, exactly the same thing.
Motivation
Macduff is driven first by loyalty to Scotland and to Duncan's legitimate line, and then — after the murder of his family — by a grief that hardens into purpose. By the final act, vengeance and justice are inseparable in him, which is precisely what the play requires.
Personality
Macduff is a man of action rather than reflection — he acts on his suspicion of Macbeth without fully calculating the consequences for his family, and the play holds this against him even while making him its instrument of justice. His grief scene in Act IV is the most emotionally direct in the play: a man absorbing catastrophe without self-deception, whose devastation is proportionate and therefore unbearable to watch.