What language techniques are used in act 4 scene 2 and what do they convey to the audience?

The grotesqueness of the theatricality surrounding the Duchess’s death also highlights her majestic nature. She is at peace while madmen dance and sing around her, while fake corpses surround her, while Bosola changes personas again and again, and while Cariola fights desperately for her life. Further, there is a great theatricality in the use of the madmen, whose several speeches creates a creepy theatrical atmosphere. Her ability to ignore them is another sign of her strength. The horrors surrounding her also serve to show that her dying is not synonymous with her being defeated by her brothers, for she is escaping this hell on earth that they have created, and into which they will fall prey to themselves during the final act.