Roger Chillingworth is a depraved soul who is out to seek revenge on Hester's "baby daddy" and he will stop at no end until he gets what he wants. Eventually, Dimmesdale comes forth as Hester's partner in adultery and the hole time Dimmesdale is confessing, Chillingworth is begging him to stop. Chillingworth enjoys manipulating Dimmesdale into insanity and begs him to stop confessing because he knows that once everyone knows about Dimmesdale's sin then he will have no power over him. Chillingworth is the perfect last name for such a nefarious character because it depicts his character with in it. He is a very chilling character and is, overall, a terrible person!