Azure Guardian

The Azure Guardian was one of the Accord. He was the Guardian of the Quantum Realm, (PROSE: An Ordinary Man) one of the Six-Fold Gods of the Six-Fold-Realm and a Guardian of Time that represented Equilibrium (PROSE: The Quantum Archangel) and balance. (PROSE: An Ordinary Man)

Along with his fellows, the Azure Guardian was in attendance for the creation of the universe. (PROSE: The Whoniverse)

Eileen Younghusband met the Azure Guardian in Calabi-Yau Space. He gave her a time ring and sent her to find Alistair Lethbridge-Stewart and bring him back to Calabi-Yau Space. (PROSE: An Ordinary Man)

Behind the scenes
The idea, echoed in Divided Loyalties, that there were more than two Guardians of Time, that they should be counted among the Great Old Ones, and that they originated as the "upper echelons" of the earlier race of Time Lords who ruled the previous universe, was based on a cosmology outlined by Craig Hinton. Notes explaining his view of the matter were written as part of the preparatory work for The Quantum Archangel, and later printed in the charity anthology Shelf Life. Therein, Hinton explained that in his theory: "The High Council of the Old Time Lords were all linked to the Matrix when the universe ended. They became the Guardians – sentient life forms that acted as the vessels or conduits through which the fundamental essence of the Universe could act."

- Craig Hinton

Therein, the Azure Guardian is accounted for as the Castellan (with the White Guardian having been the President and the White Guardian his Chancellor). Hinton's concept of the Azure Guardian was as a dual being: "The Guardians of Balance in Time, the Guardians of Equilibrium, They Who Walk Both Paths."

- Craig Hinton