This study explained Nice Girl syndrome in Elizabeth Gaskell's Ruth to prevent mental disorders. A mental disorder is a clinically significant disruption in cognition, emotion regulation, or behaviour. There are several mental disorders, including Nice Girl syndrome. Beverly Engel's Nice Girl syndrome was the study's grand theory. The Nice Girl Syndrome theory was used to analyze Elizabeth Gaskell's Ruth's female characters' thoughts and behaviour. This study revealed seven of ten signs of Nice Girl syndrome, such as "other people's feelings and needs are more important than her own", "she believes that she will be treated nice and fair as long as she is nice and fair", "other people thought about herself is more important than her self-esteem, health, and safety", "she will be accepted and loved if she is good and perfect", "she believes that she does not have the right to stand up for herself or act on her behalf", "she believed that anger is a destructive emotion and should not be expressed directly to those with whom she was angry", and "she believes that it is better to avoid conflict at all costs".