“Roger Chillingworth” is actually Hester’s husband in disguise. He is much older than she is and had sent her to America while he settled his affairs in Europe. Because he is captured by Native Americans, he arrives in Boston belatedly and finds Hester and her illegitimate child being displayed on the scaffold. He lusts for revenge, and thus decides to stay in Boston despite his wife’s betrayal and disgrace. He is a scholar and uses his knowledge to disguise himself as a doctor, intent on discovering and tormenting Hester’s anonymous lover. Chillingworth is self-absorbed and both physically and psychologically monstrous. His single-minded pursuit of retribution reveals him to be the most malevolent character in the novel.