As his name suggests, Roger Chillingworth is a man deficient in human warmth. His twisted, stooped, deformed shoulders mirror his distorted soul. From what the reader is told of his early years with Hester, he was a difficult husband. He ignored his wife for much of the time, yet expected her to nourish his soul with affection when he did condescend to spend time with her. Chillingworth’s decision to assume the identity of a “leech,” or doctor, is fitting. Unable to engage in equitable relationships with those around him, he feeds on the vitality of others as a way of energizing his own projects. Chillingworth’s death is a result of the nature of his character. After Dimmesdale dies, Chillingworth no longer has a victim. Similarly, Dimmesdale’s revelation that he is Pearl’s father removes Hester from the old man’s clutches. Having lost the objects of his revenge, the leech has no choice but to die.
Ultimately, Chillingworth represents true evil. He is associated with secular and sometimes illicit forms of knowledge, as his chemical experiments and medical practices occasionally verge on witchcraft and murder. He is interested in revenge, not justice, and he seeks the deliberate destruction of others rather than a redress of wrongs. His desire to hurt others stands in contrast to Hester and Dimmesdale’s sin, which had love, not hate, as its intent. Any harm that may have come from the young lovers’ deed was unanticipated and inadvertent, whereas Chillingworth reaps deliberate harm.