? The nature of evil is shown in the plays Macbeth and King Lear. Lady Macbeth from Macbeth and Edmund from King Lear are two of the characters that show evil in the plays. Lady Macbeth's evil is shown through her actions. She is always telling Macbeth what to do so she can become the Queen. Edmund is trying to start trouble when he writes a letter and signs it with his brother's name. With these evil characters, it makes the plots more interesting. Without evil, the plays would not be as affecting or meaningful. Macbeth is a very exc ....