Mr. Dempster is a devout Baptist preacher, husband to Mary and father to Paul. He is considered by many to be religiously devoted to a fault, possessing no judgment of his own and deferring always to God. In many ways his religious convictions and arguably good intentions nevertheless lead him to treat his family poorly, preventing Paul from practicing magic and restraining Mary in the house with a rope and harness after she betrays him by sleeping with the tramp. He eventually dies during the influenza epidemic of 1918.