Civilians

If a character resigns membership in their faction (or, alternatively, they accrue sufficient demerits to be thrown out), that character becomes a civilian and is now, by default, a member of the Yellow faction.

That civilian may continue to work for their old faction, trying to accumulate enough merit points to once again earn their place as a citizen. Alternatively, they now have the option to try and join one of the other factions by the same method, or simply 'go it alone'.