The Orders Vespila is one of the Orders Minoris of the Adepta Sororitas located in the Calixis Sector, an Imperial sector located in the Segmentum Obscurus on the northern edge of the known galaxy, near the Halo Stars and the Eye of Terror.
The "dark sisters" of the Orders Vespila are tasked by Cardinal Kregory Hestor with the sanctification of the bodies of fallen kin, and are sometimes called upon to serve as forensic specialists when a Throne Agent has recourse to disinter a long-dead corpse.
The Orders Vespila were created when Cardinal Kregory Hestory petitioned the Orders Hospitaller to populate this Order within the Calixis Sector. Tasked with the internment of bodies, the Order Vespila's grey-shrouded ceremonial robes are synonymous with the death of Adeptus Ministorum priests. The sisters of the Order Vespila have earned the name "dark sisters" because of their association with the death of beloved Ecclesiarchal clergy.
It is unknown why Cardinal Hestor felt it so important to be certain that the bodies of the faithful were properly buried, but rumours abound that he has secret knowledge of a prophecy regarding a long-dead saint. When an Inquisitor needs the Sisters' macabre skills he calls upon the Ecclesiarchy to provide him with the graveyard guards of the Order Vespila.
- Dark Heresy: Blood of Martyrs (RPG), pp. 79, 97