A field commander with unmatched combat skills, Paige has endured her share of tragedy. Separated from her Grid "family" during a battle, she was rescued by Tesler. This resulted in a deep loyalty to him, which occasionally blinds her to his darker side. She is Beck's chief antagonist and eventually, the object of his desire.
Paige is blinded by her loyalty to Tesler and ultimately believes she is fighting for the right side when in reality she is helping to oppress the programs of the Grid.
For this innate goodness, Tesler himself does not give Paige his full trust, as he killed a program Paige had promised would be pardoned without her knowing.