A cultist is a devout follower of a dark god, although they are easily coerced or deceived into this life or belief. Others find their way into the cult through fear, desire for revenge or destitution, once in they are quickly indoctrinated into the mindset of the cult, led by a dark apostle.
Life for low level cultists is harsh, unforgiving and prone to discipline by the leader, as they rise up their fortunes change as they gain favour, and often the ones at or near the top become wealthy and powerful. They in turn use this wealth and power to recruit more, and the cycle perpetuates.