Faithfuls of Days are the Paradise advisers to the rulers of the one hundred constellations in each local universe. There are 70 million in existence.  They are in constant communication with their order.  They appear in personality registers under triune-origen beigns in the Stationary Sons of the Trinity group.  They are instructed to retire after Michael’s completion of sovereignty but Michael requested them to remain forever on duty in Nebadon.  They are Supreme Trinity Personalities. 
The Faithfuls of Days are the last link in the long administrative-advisory chain which reaches from the sacred spheres of the Universal Father near the center of all things to the primary divisions of the local universes.  The Faithfuls of Days, like the Union of Days, never proffer advice or offer assistance to the constellation rulers unless it is asked for.  They are the representatives of Unions of Days. 
Their Paradise reserve corps is the Advisory Commission of Interuniverse Ethics and Self-government. Faithfuls of Days rotate in service in accordance with the rulings of the supreme council of their reserve corps.  They have their own staffs of Havona and Paradise personalities. 
They are advisers to the Trinity and representatives of the constellations. Every constellation has one. Just as a Creator Son has a Union of Days assisting him in the local universe, the Vorondadek Sons who rule the constellations have a Faithful of Days assisting them. 
See also: UB 18:7.