A Crusader is a holy warrior of the Adeptus Ministorum who is recruited for his or her unflagging devotion to the God-Emperor. Most are inducted into the ranks of the Ecclesiarchy from a Schola Progenium, selected for their deep faith in the Imperial Creed and the Emperor.

To be chosen to become a Crusader is a great honour, though it leads not only to a gruelling life of asceticism and martial perfection, but also inevitably to an unmourned death in battle against the forces of heresy