Missionaries are normally preachers or priests who have travelled the stars to spread the word of the Emperor. Being such well-travelled individuals, they can often find themselves working alongside the armies of the Imperium, where they will provide spiritual support to the army until such time as their services are no longer required.

In the Imperial Guard they are represented by Ministorum Priests, men who have fought for decades with the common soldier and dedicate their lives to the spiritual wellbeing of the army. They lead by example and would gladly martyr