If Duncan had known that his own faithful host was not only going to put his life in danger but also kill him, Duncan would not given Macbeth any honors at all. In Macbeth, a play written by William Shakespeare, Macbeth, the tragic hero in the play, kills Duncan in order to make the witches" prophesy to him come true. Duncan, King of Scotland, is one of the lesser major characters in this play but plays an important role in emphasizing and clarifying Macbeth's character. .
Duncan, even though he has only a little part in the beginning of the play, he affects Macbeth's character. Duncan, as you already know, is the king of Scotland, and at the beginning he and his generals had just left the battlefield discussing Macbeth's victories at the battlefield and deciding to honor him with the title as Thane of Cawdor. Meanwhile, Macbeth has learned from the witches of his fate already, but they tell him that he will not only become Thane, but also King. After Duncan has announced Malcolm heir. Macbeth rages, he sees that he must do something in order to make the prophecy come true. That's why he kills Duncan, but doing so he receives guiltiness and regrets doing so after words.
Duncan was a very nice person and also related to Macbeth. Macbeth however, knew this from the beginning, but greed and pressures from his greedy wife had caused him to lose his mind and kill Duncan to become king. This results in Macbeth constantly throwing mental fits. Such as the time of the feast he had with the noblemen to celebrate his power to the throne. In such actions, he caused the suspiciousness of the noblemen. Macbeth even mentions seeing a sword waving above his head when he is going to kill Duncan, this could even represent his downfall. Though how minor a character, one can argue that Duncan made a difference in Macbeth's further actions till his death. .