Through persuasion and criticism she was able to manipulate her husband thereby suggesting elements of evil and sinister-like qualities in Lady Macbeth.
There is a defined relationship between manipulation and ambition in this play. That is, Lady Macbeth's ambition drives her to persuade her husband into the murdering of innocent people. The first example of her determination is apparent in her soliloquy, which is started off with a tone of certainty and conviction. "Glamis thou art, and Cawdor; and shalt be what thou art promised. (I, V, 14-29) Ironically, this tone does not alleviate the strength of her character but instead makes the reader wary of her. This draws the reader's interest and creates a feeling of the oncoming evil that seems inevitable. Hence, the reader can indicate the instrumental role that Lady Macbeth is going to play in the build up of darkness later on. But the primary example of her ambitious behaviour is evident in the plot for her husband to become king. As claimed by the witches, Macbeth would be king, however the means of how this would become was never discussed until Lady Macbeth is introduced. .
When the reader is first introduced to her, she is asking for spirits to "unsex me"(I, V, 44). "The language suggests that her womanhood, represented by breasts and milk, which are usually symbols of a nurturer, prevents her from performing acts of violence and cruelty, which she associates with manliness. "[2] This also reinforces the link between gender and violence. This statement displays the immense ambition she has to become queen, demonstrating she will go to any lengths in order to accomplish her goal. .
The devised plan by Lady Macbeth further shows her great ambition to become Queen of Scotland. Lady Macbeth states to Macbeth: "O, never shall sun that morrow see!" (I, V, 67-68) referring to the murdering of King Duncan providing evidence of her great ambition.