They are my version of witches and wizards, though they simply Enchant things to benefit the other Creatures. They enchant rings for the Vampires to use in order for them to walk upon the surface, and be amongst humans, and they enchant other objects for other Creatures to use though that isn't really shown in the series, just barely touched upon.
Now, compared to the Vampires and Lycans they sound pretty dull, don't they? I thought so too while writing the first three books (as they are immensely Vampire and Elite Creature heavy), but I knew it was time (in writing the fourth book: The Phoenixes of the Nest), to showcase their true power and what they can really do.
Though it is hinted at in one of my favorite scenes in the entire series in Book 2: THE IMMORTAL'S GUIDE that MOST if not ALL of the Enchanters in the World are NOT happy about their lot in life, taking care of the Vampires essentially and this unhappiness, as it is wont to do, boils over to epic proportions later in the series.