Neveu’s presence in the novel embodies the Chinese idea of yin and yang, or two complementary forces that work together in harmony. From Langdon and Teabing, Sophie learns that pagan religions and the Priory valued balance between male and female. Sophie and Langdon form the male and female halves of a single protagonist, and their goals never diverge. In this way, they echo Teabing’s and Langdon’s ideas about the partnership of Jesus and Mary Magdalene. In their view, the male and the female worked together toward a goal, without the female being subordinate to the male in any way.

Both Sophie and Langdon, like the Mona Lisa, exhibit male and female traits: for example, Langdon’s headiness is balanced by Sophie’s real world know-how. Sophie is quick-witted, agile, devious when she needs to be, and physically assertive, as when she helps to disable Silas in the chateau. But at the same time, she is caring and compassionate. She feels the loss of her family deeply and mourns the death of her grandfather. Both brilliant and sexually attractive, Sophie combines a masculine toughness with typically feminine qualities.