All highly individualized.  Chiefs of assignment direct all orders.  Custodians of creature identity in terminal transition sleep.  In personality registers.  Limited in spirit polarity regarding circuits of Father. 
Angels of Paradise.  Command seraphic hosts on rebellion-isolated worlds.  General custodians of creature-trinitized sons.  Have existed since eternity.  Offspring of Infinite Spirit.  Paradise arrivals associate with.  Perfect beings, but not absonite or absolute.  Planetary chief of seraphim on Urantia is a primary supernaphim. 
Types work interchangeably. 
Angels of Havona.  General custodians of creature-trinitized sons.  Minister to ascenders, Paradise Citizens in Havona.  Not created until arrival of Grandfanda.  Offspring of individual Master Spirits. 
Creation indicative of God the Supreme.  Custodians of Records chosen from.  Offspring of Seven Spirits of Havona Circuits.  Servants of Seven Master Spirits.  Summon seraphim to Seraphington.  Transporters operate among Havona circuits; land on peripheral Paradise. 
Accompanied Michael on seraphic bestowal.  As Evangels of Light attached to finaliter companies.  As Most High Assistants.  As Paradise Companions, Technical Advisers.  Throughout grand universe.