The Believers tend to attract people of strong faith and unshakable beliefs, as well as those relatively weak-willed people who need something strong and unshakable to hang onto. There is room for all seekers at the doorway, and even if a would-be Believer is knocking at the wrong door, most groups are kind enough to send her towards the right one. Usually.

Most of the Believers are either extremely young Wraiths, seeking to make sense of what's just happened, or clinging to a faith that seems to have been negated. The rest of the group is made up of Wraiths who've spent some time in the Deadlands, and possibly in one of the other Concords {most likely The Order}. But then, some of the oldest Wraiths in the Deadlands are Believers: still trying to make the trip across the Barrier, or volunteering to remain behind and help others reach the same understanding they did.

Almost any Deathmark can be found in the Concord, given what a widespread and powerful force for good - and ill - mortal spirituality can be. However, there seem to be a large number of Fate's children in the Believers. This is most likely because many Groups believe these Wraiths have been touched by the hand of their God, and they would be foolish to turn them away, or treat them badly.