A Witch Hunter stands with her retinue and the mighty warriors of the Adepta Sororitas against Chaos.

The most insidious and dangerous threat is the one you cannot see. It is this thought that spawned the Inquisition, an organization devoted to rooting out traitors, heretics, mutants, and aliens that undermine Humanity. These threats are so pernicious that the Inquisition has full command of the might of the Imperium of Man, from the stalwart Space Marines to the ordering of Exterminatus – the orbital destruction of an entire world.

Within the Inquisition, there are Orders that specialize in fighting particular foes. The Ordo Hereticus, or Witch Hunters, are devoted to fighting the mutant, rogue psyker, and heretic. Mutation is an affront to the purity of Man that can and does manifest itself at any time. Meanwhile, rogue psykers can twist the natural order and even call forth Daemons from the Warp. Lastly, heresy knows no bounds and thus requires the most vigilance from the Inquisition to uncover and eliminate. In the end, these very forces could shatter the Imperium if left unchecked.

In their never-ending quest to protect the Imperium, the Witch Hunters have access to the most lethal weapons and agents known to Man. They also have a historical tie to the Adepta Sororitas – the Sisters of Battle. As the Chamber Militant of the galaxy-spanning Ecclesiarchy, the Sisters of Battle are fierce warriors that are equals to their brother Space Marines. What the Sisters lack in genetic enhancement they make up for in faith and devotion. No one is more devoted to the cause and cult of the Emperor than they.