Ordo Malleus

The Ordo Malleus is a Catholic Church organization. It first appears in The Warrior.

Description
The Ordo Malleus is a small Church organization dating back to its start, whose purpose was fighting pseudogods, vampires, faeries, and assorted monsters. It is the group from which the Inquisition has started, and, in an attempt not to repeat its exploits, is bound to the utmost secret and rarely takes action directly, preferring to support people like the Knights of the Cross.

The Warrior
In The Warrior, Father Forthill implies that the Ordo trained and handled Father Douglas, before he went rogue in the hunt of the Swords of the Cross.