write a critical note on female leading character in the novel?

Nancy is a complex and fascinating character precisely because it is so difficult for the reader to effectively understand her in simple terms like "good" or "evil." She commits the heroic act of sacrificing herself for Oliver's sake, but she also commits several crimes throughout the story. A good place to start for this question would be to explore the intricacies of good and evil--especially in regards to the often blurred line between them.