Lennox is a lord whose attitude tracks public opinion: an attendant in Acts 1 to 3, a sarcastic critic in Act 3, Scene 6 who is still at Macbeth's side in Act 4, Scene 1, bringing word that "Macduff is fled to England", and a rebel marching to join Malcolm in Act 5, Scene 2. His double life shows how people survive under a tyrant, saying one thing in private and doing another in public.

He reports the unnatural night of the murder (Act 2, Scene 3): "Lamentings heard i' th' air, strange screams of death".

"How it did grieve Macbeth! did he not straight, / In pious rage, the two delinquents tear" (Act 3, Scene 6). Sustained verbal irony: every word of praise means its opposite. Under a tyrant, irony is the only safe way to tell the truth.
"To dew the sovereign flower, and drown the weeds." (Act 5, Scene 2). Malcolm is the flower, Macbeth the weed, picking up Duncan's gardening image (Act 1, Scene 4).

Act 3, Scene 6 is a structural hinge: the first scene where a lord calls Macbeth a tyrant, naming "the tyrant's feast". Use Lennox to show Scotland turning, and appearance and reality in the language of fear.

He reports the unnatural night of the murder (Act 2, Scene 3): "Lamentings heard i' th' air, strange screams of death".

"How it did grieve Macbeth! did he not straight, / In pious rage, the two delinquents tear" (Act 3, Scene 6). Sustained verbal irony: every word of praise means its opposite. Under a tyrant, irony is the only safe way to tell the truth.
"To dew the sovereign flower, and drown the weeds." (Act 5, Scene 2). Malcolm is the flower, Macbeth the weed, picking up Duncan's gardening image (Act 1, Scene 4).