Lady Macbeth's main character flaw is her narcissism. She is devoid of empathy, she is cruel, selfish, driven by power and greed and a master of manipulation. She is able to control her husband Macbeth into doing whatever she wants for her own gain. For Macbeth his main flaw was his misguided ambition, he wanted to be King but allowed himself to be easily manipulated by his wife and other characters ie. the witches, he lacked confidence in himself and gave into the will of others.
