CHANGE -the process a mortal undergoes to become a vampire .
FALLEN -the Watchers after the fall from grace. They have been stripped of their wings and their souls, leaving them as immortal blood drinkers who cannot procreate.
LYCANS -a subgroup of the Fallen who were spared vampirism by agreeing to serve the Sentinels . They were transfused with demon blood, which restored their souls but made them mortal. They can shape-shift and procreate.
MINION -a mortal who has been Changed into a vampire by one of the Fallen . Most mortals do not adjust well and become rabid. Unlike the Fallen , they cannot tolerate sunlight.
NAPHIL -singular of nephalim .
NEPHALIM -the children of mortal and Watcher parents. Their blood drinking contributed to and inspired the vampiric punishment of the Fallen .
SENTINELS -an elite special ops unit of the seraphim , tasked with enforcing the punishment of the Watchers .
SERAPH -singular of seraphim .
SERAPHIM -the highest rank of angel in the angelic hierarchy.
VAMPIRES -a term that encompasses both the Fallen and their minions .
WATCHERS -two hundred seraphim angels sent to earth at the beginning of time to observe mortals. They violated the laws by taking mortals as mates and were punished with an eternity on earth as vampires with no possibility of forgiveness.