There is no narrator in Macbeth. It is a play told by the numerous characters.
The characters in Macbeth were largely fictional, though Macbeth himself is based on a real Scottish king who reigned in the 11th century. Lady Macbeth is thought to have been inspired by the historical figure Gruoch, who was the wife of Macbeth.
over ambition- greed
At the start of Macbeth the witches are plotting something.
Probably
Banquo and Macbeth. And the other witches, of course.
Macbeth caused it, Lady Macbeth proposed it, the stewards were killed for it, and the king's sons took the blame for it.
Seyton was loyal to Macbeth right to the very end.
The three witches.
There are a bunch of witches and a ghost.
The Witches.
The theme of power in Macbeth shows how characters like Macbeth and Lady Macbeth become consumed by their desire for power, leading to their downfall. Their actions to gain and maintain power result in chaos and tragedy in the play.