I'm constantly adding more stuff to this thread as I find new things or take more pictures so check every now and then! I hope all of you enjoy the info and it's not in a confusing format.
Spoiler: Codex entry of the Vigilant ChurchShow
Spoiler: Codex entry of the Radiant LegionShow
Officially established in 1376 AE by Emperor Jarec under the Vigilant Declaration, the Vigilant Church united the religious beliefs of the Dominion under one organization. The children of Dominus became canonized as the Scions and the Eldan elevated to godhood. The Vigilant Church is very much like a traditional Earth church lead by the High Sentinel who is personally chosen by the Emperor. Underneath the High Sentinel are the priests or priestesses providing sermons called Vigils held in churches that can be found in almost every Cassian settlement that teach the way of the Scions from holy books such as the Book of Dominus or the Book of Azrion.
Spoiler: HernCo entry of the InquisitionShow
Although the Vigilant Church is now a beacon of the Dominion empire, furthering its beliefs of destiny and divine right to Nexus, it is not enforced upon its diverse citizens. Drakens are freely allowed to worship their Blood Gods without much of a second glance. Rather than fighting against the long held traditions of the other races that make up the Dominion, each unique culture is seen as a general blanket of the Vigilant Church in their own way and will gladly accommodate for different rituals.
The Vigilant Church is open to everyone, not just Cassians. Mechari are self aware enough and are believed to have some sort of soul in their crystal brain/hearts like the rest of the Dominion races. In fact, a majority of Mechari are devout followers of the church. Drakens and Chuas are rare due to their deeply routed beliefs in primal gods and science but there are exceptions to the norm. They do appear in game as random npcs and some even give you quests. There is no alienation in the Vigilant Church.
The Vigilant Church is not just all priests and preachers though and posses its own military branch, the Radiant Legion. It is one of the most famous of the legions in the Dominion military with high standards for recruits in both combat skill and religious piety. Their numbers are smaller than the other legions of the Dominion military but they are a highly skilled force known to provide significant support in the thickest of battle. Members of the Radiant Legion must cut ties with any past organizations and life they had before and devote themselves fully to protecting the church or any task they are assigned to. They are lead by the holy commander of the legion who only answers to the Emperor and High Sentinel of the Vigilant Church, not to anyone else. With this direct line to the most powerful people of the Dominion, the Radiant Legionnaires are renown for their unshakable loyalty. This puts the Radiant Legion in a higher public standard than other legions but is open to all dominion citizens if they can prove themselves worthy of the difficult task ahead of them.
A smaller and lesser known organization of the church is the Inquisition. Focused on upholding the purity of the Vigilant Church through teams of small operatives, they are assigned to root out heretics and cults. They do not take much part in the public eye like the Radiant Legion so not much is known about rankings or practices beyond punishing those who are a threat to the sanctity of the church and Empire. They are quite respected and feared by their enemies and even fellow Dominion citizens. Cassians make up a majority of their numbers.
This thread is very image heavy underneath all the spoiler tags!
Going Deeper Into the Vigilant Church
They are the sons and daughters of Dominus who have been canonized by the Vigilant Church and are now worshiped as saints. Each one represents a different Vigilant Virtue and have their own teachings found in their Books. Dominus is still the center of the Vigilant Church but the Scions are called upon more if anything specific is needed such as strength or justice.
Important Figures of the Vigilant Church and anything relating to it
Looking good in your Sunday Best
Vigilant Related Journals and Quests
Assorted information relating to the Vigilant Church
Images of the Vigilant Church and Radiant Legion
Interior and Exterior shots of the churches and gatherings of the Vigilant Church
Information Confirmed by Pappy or HernCo
Gathered from Twitter, Livestreams, and Reddit
Random Personal Notes
Not official canon information but common themes I have noticed and some theories.
More always coming!