As a key Ecclesiarchy holding in the sector, it is no surprise that Ossuar is home to a convent of the Sisters of Battle of the Adepta Sororitas. Canoness Liona leads more than 300 Battle Sisters of the Order of the Shining Blade, who stand ready to defend the Shrine World against any threat. At any time, the Sisters of the order are spread across Ossuar, watching over pilgrims and guarding shrines, resplendent in their white and gold armour. The site of the convent adjoins the Mausoleum of Remembrance, and one of the Sisters’ primary duties is guarding the mausoleum and shepherding pilgrims through its grand corridors.
At the behest of Ossuar’s sitting Arch Cardinal, the Battle Sisters of the Shining Blade have participated in numerous actions across Askellon in the millennia since the order’s founding as a successor to the Order of the Ebon Chalice. Squads of Battle Sisters have fought heresy and insurrection as far afield as Desoleum and Cel. Such deployments are typically in response to requests from other dioceses, but some actions, such as the Quelling of Hive Suzzum, have been at the behest of the Adeptus Administratum.