Hunters

Overview
Before the surge of magic in the late 90s, displays of the supernatural went hindered by the Veil, an element of the Od. Since most humans agreed that such things didn't exist, roughly 3/4s of the human population (excluding some mentally ill persons who were immune or resistant to the Od), didn't possess the willpower to defy the effect of the Veil and thus would fall victim to the enchantment which caused them to eventually forget such things which made no sense overtime. Another 20% would remember the events, but were likely to rationalize it away, dismissing a werewolf attack as a bear attack.

Only 2% of homo-sapiens during this time had the capacity to bear witness to such events, not lose their shit, and have the capability to remember this sort of event. These 2% became known as having the Mark of the Hunter. Of course, having the mark doesn't make you a hunter as you still need to have an encounter, survive to tell the tale, and have time and a mentor to develop the skills... and a desire to do something about what they now know is real.

And that was before the explosion of magical energy which overloaded the Veil and slowly caused the effect to diminish, opening the eyes to more and more people to the truth of the supernatural. But this still didn't allow more people to become hunters, it was just a weakening of the veil. The Hunter's exceptional willpower is what marked them as special and even though you might have the knowledge and the skills to fight the supernatural, if your willpower isn't up to snuff, then you're as good as dead the moment you face off against a mind-bending vampire, a terror-inducing werewolf roar, or get possessed by a demon looking for an easy way to infiltrate a cell of hunters.

1 in 4 hunters possess indomitable willpower and the other 3 possess the next best thing. Anything less than that, and you might as well call yourself an hors d'oevre.

Trivia and Notes
Missing Data

Links and References

 * List of Known Hunters