"Soul collectors," who collect the souls of dead ones when they pass, help them reach their next life. They are very respected by all but the
"Dream makers" are those who make dreams and keep them happy; they also have the ability to take away others nightmares, etc.
"Nightmares" are those who make nightmares and sometimes even kill others in their dreams,causing them to pass while sleeping. A nightmare wants all souls to stay trapped outside of their bodies and perish.
"Mortals" are the regular individuals in the world that others interact with for their purposes.nightmares.