Guardians are beings (usually Gallifreyans, but not strictly necessary) that guard the Universal Core. In order to become a Guardian, the being must always be born with the Spark of channeling. Usually the more powerful the Channeler, the higher up in the Guardian hierarchy they will find themselves. Guardians are assigned to a specific post due to their Talents.
When a Guardian first signs up to be a Guardian, they become an Azure. When they have enough training, they become candidates for Guardians, Azure Guardians. Once they complete a test, they are put in a poll and citizens vote on who should be a Guardian. If they are voted for, they become Low Ranked Guardians, and are sworn on the Oath Rod not to tell lies and to guard the core.
If any Guardian misuses their powers, the Council of Forces can take their powers away.