In my game the Brides of Emperor is now an independent organization, who has achieve his freedom thanks to the links with nobles of Sisters Famulous.

The Sisters Famulous are now the dominant caste of Brides of Emperor, which goal is lead the Imperium in harmony without clash between the Ministorum and the Adeptus Terra, trying to reconcile the dogma of Ministorum with the Imperial Law.

The Sisters Famulous give the money and resources to maintaining the Sister of Battle, the Chamber Militant of Brides of Emperor.

In the past, after the Age of Apostasy, the Brides of Emperor were the support of the newly Ordo Heresticus, which primary duty is control the Ministorum.

However, the Ordo was small and poorly organized, so, during the centuries the Sisters Famulous have managed the way to obtain complete freedom; still they support many Inquisitors, especially those from the Amalathians faction and from Thorian faction, who share their religious beliefs.

After Vandire, the Brides of Emperor are been involved more and more in Schola Progenium with the Administratum, the Arbites and the Imperial Guard, while the Ministorum abandoned the Schola slowly in time.
This because the Bride of Emperor are lead by the Sisters Famulous who have a point of view more moderate and are more diplomatics toward the Administratum.

During the ages, are borned new small moderate sects attached to the Brides of Emperor, and this sometimes lead to clash with the Ministorum.

However, the Brides of Emperor are still a small organization, which must use her power with cunning to avoid major problems.

Ok, why have I changed the Sisterhood?
Because I've realized that the Sister of Battle are part of Brides of Emperor and probably they are the smallest part.
BUT often they seem the principal part.
I understand that this came from the TT, but this is an RPG and things are different.

(sorry for bad english)