She then becomes a student of Father Dirrag, a Jesuit who secretly teaches materialism. Therese spies on Dirrag counseling her fellow student, Mlle. Eradice, and preying on her spiritual ambition in order to seduce her. Through flagellation and penetration, Dirrag gives Mlle. Eradice what she thinks is spiritual ecstasy but is actually sexual. "Father Dirrag" and "Mlle. Eradice" are named after anagrams of Catherine Cadière and Jean-Baptiste Girard, who were involved in a highly publicized trial for the illicit relationship between priest and student in 1730.