The introduction of the Lady Macbeth in the play “Macbeth” highlights her ambitious nature that she possesses for her husband to achieve. Her actions reveal much about her steps and plans which she has pre-planned. She had the finest quality of being manipulative and influencing. She planned the murder of King Dunken and motivated her husband to commit the dead. To give encouragement to Macbeth she herself went to kill King Dunken. Though she was unable to kill him as she found her father's image in sleeping Dunken. She also gave her full support to her husband in attaining the position. In the play she has been regarded as the “fourth witch.” the three witches' prophecies and the plans and encouragement of Lady Macbeth made Macbeth move forward with his wicked plans. At the end of the play, it is seen that she become mentally ill. Since she too played an important role in the murders, she became weak and intolerant of her own ills. She died of this illness for which she herself was the one responsible.