Qu'on was a Taelon who served as the leader of the Synod and thus determined the actions of their race.

He was briefed by Da'an about the possibility of using their species regeneration technology to resotre the hands on Julie Payne as part of a public relations exercise. (Episode: Miracle) During the funeral of William Boone, Quo'on, Da'an and Zo'or attended the event when a Jaridian Replicant attacked. The attack led to the death of Quo'on and left a power vacuum within the Taelon leadership with Da'an and Zo'or being two candidates to succeed their former leader. (Episode: The First of its Kind)