The Sibylline Sisterhood were a women-only cult of soothsayers active in the ancient Roman Empire, which followed the prophesies set down in the Sibylline Oracles by the original Sibyl herself. Membership of the sisterhood was seen as prestigious by Pompeii inhabitants, and the Caecilius family had pledged their daughter to the sisterhood for life. A Sibylline Sister could be recognised by the eyes painted on the back of both of her hands.
In A.D. 62 an earthquake in Pompeii awoke the dormant Pyrovile who took over the Sisterhood and other cults. The members breathed in Pyrovile Dust from volcanic hypocausts which expanded their latent psychic powers but also slowly converted them into stone Pyrovile. The power to communicate telepathically came from the Pyrovile influence but the power of foresight was caused by the temporal rift that was briefly created by the power of the eruption of Mount Vesuvius, echoing back through the alternative timeline in which the volcano does not erupt.
Other than killing any would-be enemies of the Pyrovile, its not known what responsibilities the Sisterhood had in the Pyrovile's grand design.
Sibylline Sisters in A.D. 79 include: The High Priestess, Spurrina, Thalina, Evelina Caecilius Iucundus, and one other soothsayer left unnamed. Evelina alone survived the eruption but is no longer with the Sisterhood. (DW: The Fires of Pompeii)
