A positive tone I think try your best
I'd like to think it adds a tone of disgust. "Horrible vermin", as in "gross creature."
Mary Shelley uses a multiple narrative in Frankenstein. A multiple narrative (sometimes referred to as an epistolary narrative) uses the voices of multiple characters within the text. Epistolary narratives can also use letters (such as Walton's four letters at the opening of the novel and the letters between the Frankenstein family) to detail parts of the plot and storyline.
Its a<span> logical fallacy in which the reasoner begins with what they are trying to end with.</span>
