An indirect characterization could be that she is greedy, selfish, and impatient. We can see this in how she goes to the Devil to make a deal with him on her own, rather than waiting for her husband to do it. We can also see this in the fact the story says she keeps things from him, even though they're are married. This could show how she only desires things for herself and doesn't want to share. Hope this helps! :)
Tom's wife, or Mrs. Walker is described as a miserly woman. She dies trying to make a bargain with the devil.
Explanation:
She does not have a good relationship with Mr. Wlaker, her husband. Actually, she ufights with him. Their life is miserable. They are cheapskate and they conspired to cheat each other.