Sophie Neveu

Sophie arrives at the Louvre the night Saunière is killed. She knows Captain Fache has already decided Langdon is guilty and warns him in secret. The two slip out of the museum together and go on the run from the police.

Saunière's body was left in the pose of Leonardo da Vinci's Vitruvian Man, with coded messages around it. Sophie sees that some of them were written for her. An anagram sends the two to the Mona Lisa, and from there to more clues hidden in the museum.

The clues lead to a Swiss bank in Paris, where the two retrieve a cryptex with a papyrus inside. The manager, André Vernet, tries to kill them to take it. Sophie and Langdon get away and bring the cryptex to Leigh Teabing, a Grail scholar.

Teabing lives in a manor outside Paris and has spent his life studying the Grail. When the police show up, the group flees to London on his private plane, with his butler Remy on board. Sophie still doesn't know who she can trust.

Teabing tells Sophie the Grail is Mary Magdalene, Jesus's wife and the mother of his child, and that the Priory of Sion protects their descendants. In London, he's revealed as the Teacher who had Saunière killed, and he's arrested without the papyrus.

Before that, Remy turns on the group and takes Teabing hostage. It's staged: Teabing is the one giving the orders, and he later poisons his own butler. At Isaac Newton's tomb, Langdon opens the cryptex first and hides the papyrus before Teabing can grab it.

The last clue leads to Rosslyn, in Scotland. There, Sophie learns that Saunière wasn't her grandfather by blood but her protector, and that she descends from Jesus and Magdalene. The family she thought she lost in a car crash takes on a new meaning. Members of the Priory, including Sophie's grandmother, promise to protect her.

Sophie and Langdon say goodbye there with a kiss on the forehead. She stays in Scotland with the Priory. Back in Paris on his own, Langdon finally works out where Magdalene's tomb is.

In the books, Sophie appears in Dan Brown's The Da Vinci Code (2003). The film changes parts of her family's story.