Inquisitor

"No spawn of Hell can hide from the gaze of the Inquisitor, no matter what form it takes."

Inquisitors are a type of enforcer found in many organizations across Sanctuary's history.

Lore
Groups that utilized Inquisitors include(d) the following:

Cathedral of Light
Inquisitors served as the basic infantry of the Cathedral of Light. Well trained and equipped, Inquisitors sometimes served as bodyguards for high-ranking officials such as Master Inquisitors.

Their counterparts of the Triune were named Peace Warders.

Coven
Inquisitor Hamath and the Grand Inquisitor bear the title of an inquisitor, focusing on torture and interrogations.

Burning Hells
Inquisitor Sebacious is a Terror Demon, the ancient torturer.

Templar Order
Inquisitors were present in the Templar Order. They were responsible for the initiation of new Templars into the order through means of torturing them in order to "cleanse" them of their "sins" and remove the memories of who they were before they joined the order.

Diablo III
Templar Order Inquisitors are fought in "The Templar's Reckoning" follower quest in Templar Outpost. They are identical to Westmarch Soldiers in terms of abilities, and are armed either with spears or with crossbows.

As of patch 2.2.0, one may also encounter a Templar scouting party (busy abducting villagers) in the Weeping Hollow, during the named Templar Inquisition.

Uniques

 * Grand Maester
 * Maester Gnaeus
 * Maester Julius
 * Maester Licinius