For example, after learning of Macbeth's ambition to be king, Lady Macbeth immediately begins plotting to kill King Duncan. She convinces Macbeth to do it, even though he is hesitant. When Macbeth falters, she berates him and calls him a coward.
Lady Macbeth is also ruthless in her treatment of others. She is dismissive of her husband's feelings, and she is quick to anger. She is also manipulative, and she is able to use her charms to get what she wants.
Lady Macbeth's ruthlessness ultimately leads to her downfall. She becomes consumed by guilt and madness, and she eventually takes her own life.