Tom Walker and his wife are extremely greedy, insensitive people who are both willing to sell their souls to the devil in exchange for wealth. At the beginning of the short story, Tom's unhealthy marriage is described, and the narrator mentions that Tom and his wife continually hide their personal possessions from one another. They constantly argue, and some of their fights turn physical. Tom is portrayed as a selfish, unhappy person and his wife is described as a termagant.
One of the reasons Tom doesn't fear the devil is because he lives with such a miserable, aggressive wife. After Tom comes home from meeting with Old Scratch and informs his wife about the devil's proposition, she encourages him to sell his soul, which reveals her callous, selfish personality. She then takes it upon herself to strike a deal with the devil and attempts to exchange her soul for money, which does not work in her favor. Overall, Tom and his wife are depicted as miserly, greedy people, who enjoy arguing and live miserable lives.