Who is Atropos / Count Charles La Force from Flashman & the Angel of the Lord: From the Flashman Papers, 1858-59 and what is their importance? "Flashman_&_the_Angel_of_the_Lord:_From_the_Flashman_Papers

The leader of a trio of white-hooded Southern gentlemen who confront narrator Sir Harry Flashman in a Washington, DC, hotel room shortly after he and fiery Annette Mandeville have finished having sex. Atropos, along with Lachesis and Clotho, is a leader of Kuklos, an organization devoted to preserving slavery. Later in the novel it is revealed that he is the Count Charles La Force and Annette's husband.