Macduff A thane (nobleman) of Scotland who discovers the murdered King Duncan. Suspecting Macbeth and eventually turning against him, Macduff later flees to England to join Malcolm. When Macbeth arranges the murder of his wife and children, Macduff swears personal revenge.
Lennox, Ross, Menteth, Angus, Caithness Thanes of Scotland, all of whom eventually turn against the tyrannical Macbeth.
The Porter, the Old Man, the Doctors Three commentators on events, all of whom have a certain degree of wisdom and foresight. The Porter hints at the Hell-like nature of Macbeth's castle; the Old Man associates the murder of King Duncan with the instability of the natural world; the Doctors recognize disease and disorder even though they cannot cure it.
The Witches Three agents of Fate who reveal the truth (or part of it) to Macbeth and Banquo and who later appear to confirm the downfall and tragic destiny of the tyrannical Macbeth.
