Confessor
From Lexicanum
Confessors are evangelical zealots. Their oratory skill can stir the emotions of entire crowds, leading them to confess personal heresies and mutations, and to betray their neighbors as psykers or other deviants.
They are free to wander within an entire diocese and preach among the population. They often work on Imperial colonies with planetary governors and are especially useful on worlds where faith is lacking and the people are rebellious. With special dispensation from the Ecclesiarchy, they may even gather armies of Frateris Militia and lead wars of faith against the enemies of the Imperium. Confessors often wear the Rosarius as both protection and a symbol of their rank.
A Confessor attached to the Missionarus Galaxia is styled Confessor-Militant2:
