Very concerned with her appearance and the orderliness of her possessions, not through vanity, but in her conviction that she should appear in the 'proper' way
Eliot connects Nancy's concern with outward appearance to her inner psychology, perhaps implying that, just as she is overly fastidious and rigid in matters of appearances, she is psychologically inflexible
Both in her attitude to Godfrey before their marriage, and in her 'difficult resistance to her husband's wish to adopt a child', Eliot suggests that Nancy's highly principled outlook means she is fundamentally inflexible in her attitudes
Nancy has become a deeply introverted character 'living inwardly, again and again, through all her remembered experience' due to her childlessness and the death of at least one baby in infancy
From the start Eliot emphasises Nancy's strict moral code, which has developed into a strong sense of personal religious conviction and belief in divine providence
Nancy's fastidious character and sense of domestic duty is embodied in the changes she makes to The Red House, turning it into somewhere of 'purity and order'
Over the course of the Nineteenth Century, the orthodox Anglican Christianity that had been dominant in England was increasingly questioned, notably by George Eliot herself
George Eliot, and the Victorians in general, were very interested in the question of nature vs nurture (whether character is fixed, or shaped by upbringing)