Lady Macbeth is a central character in William Shakespeare's play Macbeth. She is known for her ambition and desire for power, which drives her to manipulate her husband into committing regicide to fulfill their aspirations for the throne of Scotland. As the play progresses, Lady Macbeth's initial strength and resolve begin to unravel. Consumed by guilt and madness, she ultimately succumbs to her inner turmoil, illustrating the destructive nature of unchecked ambition and moral corruption.