Macduff arrives moments after King Duncan has been killed and ultimately avenges the king's murder by cutting off Macbeth's head
Macduff is a foil to Macbeth, contrasting his selfish greed by sacrificing everything to see the rightful heir on the throne and restore balance in the country
Macduff's loyalty lies with his nation, willing to overlook desires for personal gain to prioritize his country
Macduff invokes heaven for revenge after learning his family was murdered by Macbeth, securing the righteousness of his quest
Macduff and Malcolm are portrayed as righteous in their quest against Macbeth, on the side of God and heaven
Macduff's killing of Macbeth highlights the contrast between their motivations: Macduff's loyalty to country and rightful king versus Macbeth's selfish ambition
Macduff's actions are prompted by love for his country and rightful king, contrasting with Macbeth's actions driven by selfishness, greed, and personal ambition