Crow, whose full name is Berthe Erica Crow, is described as looking severe. She has very pale white skin, wears black clothes, and is rather gaunt. Mrs. Crow, a cleaning lady, is a religious person who is the only Westing heir to pray. Crow is 57 years old, and her mother died when she was young. She was raised by her father, who is now dead. She had one year of high school education and married a man named Windy Windkloppel at sixteen and divorced at forty. She had chronic problems related to alcoholism when she was young and had three arrests for vagrancy. She turned to religion to beat her alcoholism, and she opened the Good Salvation Soup Kitchen on Skid Row. She is now the cleaning lady for Sunset Towers and lives on the fourth floor of the building.
Towards the end of the book, it is revealed that Crow is the former wife of Samuel W. Westing. Their only child, a daughter named Violet, drowned the night before she was to be married. It seems at first as though Westing is trying to get revenge on Crow, but, in the end, she is not the answer to the game Westing has set up in his will. At the end of the book, Crow is united with Otis Amber.