"To wrest human souls from the grip of the Daemon; to defeat the temptation within our own hearts and minds... There is a grace and a grandeur to the work of the Malleus and Hereticus. But the Ordo Xenos? It has no more gravitas than hacking away weeds in one’s garden.

By all means pursue your grace, grandeur, and gravitas then, sir. And in your prayers tonight, ask that your temptation to those things be lifted from your weak and sinning mind, so that you might feel some humility in the presence of those who ensure your garden remains safe to parade all your fine qualities in.
— Apocryphal exchange between Inquisitors Byphon and Merrinus

The Ordo Xenos (Alien Hunters), together with the Ordo Malleus (Daemonhunters) and the Ordo Hereticus (Witch Hunters), is one of the primary sub-divisions of the powerful and secretive organisation known as the Imperial Inquisition. The Ordo Xenos is served by its Chamber Militant, the Deathwatch Space Marines, who draw on Veteran Astartes from Chapters all across the Imperium of Man to form the Deathwatch's Kill-teams and destroy the many foul xenos threats to the survival of Mankind.

Notable Ordo Xenos Inquisitors