Mrs. Hale is the wife of Lewis Hale; a farmer who is the only witness to the the aftermath of the murder of John Wright by his estranged wife, Minnie.
A character with no first name, Mrs. Hale is a fellow farm wife, just like Minnie. There is no direct description of her but, her behavior throws in many clues as to her life and experience. Equally the audience can infer, from the very vocal opinions that she emits, how she feels about the entire thing.
It is evident that Mrs. Hale is a traditional farm wife who, by default, is not only her husband's wife, but also his "right hand". She shows up with Lewis to conduct the search at Minnie Wright's house, and she obediently collected Minnie's belongings as asked. She takes her role as a farm wife seriously, as she defends this particular fact about Minnie's own life when the district attorney laments the state of the house implying that Minnie does not work hard enough at home. Phrases such as
there's much to be done in a farm