How does Scout's initial description of Mayella Ewell show Scout's character growth?

As the details filter out during the trial, Scout realizes just what kind of a life Mayella leads. Alone and abandoned, she reaches out the only way she knows how. In this case it will cost the life of a gentle man, a mockingbird. Scout sees Mayella unable to handle respect. Mayella's life is filled with abuse from the town and unspeakable acts from her father. Mayella has absolutely nobody. Scout thinks that, "Mayella Ewell must have been the loneliest person in the world."