They were a group of 100 ex-mortals chosen by Caligastia from among 785,000 citizens of Jerusem to accompany and assist him in his mission as prince. All volunteered.  50 were men and 50 women; they served in pairs and the pairs lived together.  Were brought to Urantia by seraphic transportation.  They lived in dwellings provided with abundance of land.  They were the parents of 50,000 primary intermediates; each pair produced 1,000 of them.  40 of 100 refused to join the rebellion.  They constituted 10 autonomous councils presided over by Daligastia, with 10 members each. 
Of these Andonites 56 remained loyal against the rebellion; 44 rebelled.  The 55 loyalists, all except Amadon, were transferred to Jerusem upon the arrival of the Melchizedek receivers.  Inserted into their bodies a complement of the system's circuits and used the tree of life.  The hundred Andonites had received a complement of life that allowed them to feed on the tree of life and indefinitely extend their mortal existence. 
Andonic life plasm was allowed to be transplanted by Avalon surgeons into the body of the hundred Andonite corporeal members.  Before the rebellion, they did not reproduce sexually.  They were constituted as sexual creatures in order to mate with Adam's offspring.  Were equally divided as to sex.  They had the skin color and language of the Andonites.  Their material bodies were constructed ones.  They had a nonflesh diet.  On Jerusem they had no reproductive prerogatives.  The tree of life allowed them to extend their lives indefinitely. 
They were degraded to mortal status and died natural deaths.  They were deprived of the vital circuits of the system.  They were expelled from Dalamatia by semi-savage hordes.  They have an unknown fate. His Adjusters still tarry on Jerusem.  Resorted to sexual reproduction to increase their numbers. 
The plan was to procreate successors before retiring at the arrival of Adam and Eve.  Adopted many Andonic and Sangik children.  They were all agriculturists and horticulturists.  All worked using physical labor.  First introduced pottery to the world.  Assembled superior individuals.  They did not employ any method that was not natural on Urantia.  Remarkably accelerated the normal and natural evolution of the races.  Taught agriculture.  Taught the Andonites, and the red, blue, and yellow races.  Used natural means to improve the race.  The blue man is the one who benefited most from the teachings of the hundred. 
See also: UB 66:5-7.