In the Academy, the members of the Deca questioned and debated the profound wisdoms and Ancient Covenants of Gallifrey. The Deca included the First Doctor, the Master, the Rani, Mortimus, and Drax, along with five others. (PROSE: The Quantum Archangel) The Fifth Doctor dreamt that other members were Vansell, Rallon, Jelpax, Millennia, and Magnus.
Of these, Millennia and Rallon were made a part of the Celestial Toyroom, (PROSE: Divided Loyalties) Jelpax became the Coordinator of the APC Net, [source needed] Vansell became head of the Celestial Intervention Agency, (AUDIO: The Sirens of Time) and the remaining six became renegade Time Lords.
The Fifth Doctor dreamed that the group represented the top rank of students in their class, (PROSE: Divided Loyalties) despite the fact that the First Doctor was said to have not excelled academically. (TV: The Ribos Operation)