Sister Chastity
From Tardis Wiki, the free Doctor Who reference
Sister Chastity was a member of the Threshold. She killed Marquez on Icarus Falling so she could keep the box of Time Lord secrets. (COMIC: Fire and Brimstone) The Eighth Doctor encountered her again on the Threshold base of Wormwood, where she was killed by Abraham White. (COMIC: Wormwood)
