 Over the course of the show Olivia develops a romantic relationship with Peter.The Other Universe version of Olivia Dunham, dubbed by the prime universe as Fauxlivia, is an agent of the alternate and more powerful Fringe division.As of the end of season 2, Fauxlivia is sent to the prime universe by Walternate, taking Olivia's place without the knowledge of the Bishops, and maintains a close relationship with Peter for unknown reasons; this ultimately puts stress on Olivia and Peter's own relationship.