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He is called upon to treat her rapidly degrading mental instability. Upon witnessing her madness, he admits that the disease is beyond his practice.

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deliver to Macbeth the news of his wife's death

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she helps the reader establish the lengths to which Lady Macbeth has descended into her guilty madness. Lady Macbeth's night-terrors and sleepwalking would have gone unwitnessed if she had not told the doctor.

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He is aware that the Witches' predictions may be tricking Macbeth into evil actions and is the first to suspect Macbeth of murder. He dies while protecting his son, Fleance, and comes back as a ghost to haunt Macbeth.

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Banquo's son, who survives Macbeth's attempt to murder him.

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Angus accompanies Ross in bringing Duncan news of the victory over Norway, and later bringing Macbeth the announcement of his accession to the rank of Thane of Cawdor.

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He raises an army in England, and marches on Scotland with Macduff to reclaim his birthright from Macbeth. The Scottish noblemen lend their support to restore order to the land after observing Macbeth's extreme actions.

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He acts as a messenger and delivers the news of the Thane of Cawdor's treachery to Duncan. He announcing to Macbeth that he has been promoted to Thane and he reported to Macduff that his family has been slaughtered.

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He suspects Macbeth of regicide and eventually kills Macbeth in the final act. He is the avenging hero who helps save Scotland from Macbeth's tyranny

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He brings macbeth the news of Macduff's flight. He is one of the Thanes who deserts Macbeth once Malcolm invades, bringing reinforcements to Malcolm's army.

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Macbeth kills the king, becomes the new king, and kills more people out of paranoia.

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Donalbain plays his role by supporting Malcolm as his brother and Duncan as his father. Donalbain is also a boost to the King's character, as neither of his sons are involved in foul play in the play.

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He trusts Macbeth and all of his loyal men, and makes Macbeth Thane of Cawdor in gratitude for his service in the battle.

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She suggests to Macbeth that they should kill Duncan in order to make the witches' prophecy come true. She also helps her husband recover from his fear after he kills Duncan, and helps the cover up.

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The witches use a subtle way of temptation when they inform Macbeth that he is destined to be king