As Most High Assistants.  As superconscious teachers.  Can travel from headquarters of one superuniverse to. Another.  In outer space.  Not part of revealed superuniverse organization.  Relationship with Architects of Master Universe and Transcendentalers.  Serve Unions of Days in light and life.  Trinity-origin beings may employ.  Well-nigh independent of time and space. 
In personality registers.  May in future take place of Solitary Messengers.  One of few wholly secret orders.  Only Solitary Messengers aware of presence.  Possibly more being created.  Presence at inditing of Urantia Papers.  Solitary Spirits, like Solitary Messengers.  Superpersonal expression of Paradise Trinity.  Trinity-origin beings can sometimes recognize and employ.  Without discoverable form. 
See also: UB 19:5.