Banquo is a brave noble. At the beginning of the play, we learn from the Witches’ prophecy that his children will inherit the Scottish throne. Banquo is similar to Macbeth in that they both have ambitious thoughts, however Banquo demonstrates restraint as he doesn’t act upon these desires. Banquo represents the route that Macbeth chose not to take, where ambition doesn’t lead to betrayal and murder. Thus, it is Banquo’s ghost, rather than Duncan’s, that haunts Macbeth