Attendee of a reception at Cicero's museum on P4M-328. Heren attended the event with his acquaintances Sylvana and Varina. Sylvana was under the impression that Heren was her date for the evening, but she soon discovered otherwise after he and Varina went to "explore the other exhibits." (Heren privately told to Varina that he thought of Sylvana more like a sister.)
While engaging in a romantic encounter with Varina near the Great Ring exhibit, Heren and Varina realized that they were not alone. SG-1 had arrived through the gate -- though they were mistaken for rebels from Heren's own world.
Bad Guys - Heren stands at the top of a love triangle between Sylvana and Varina, who are intent to fight over his heart despite being involved in a hostage situation.