The Killer

The Killer is an NPC who has been murdering sisters in the Abbey of St. Elspeth Citharede and must be caught during One Piercing Note. They are responsible for the murder on Sister Anna as well as others during the quest. They are able to access the Abbey through a secret tunnel in the kitchen. When the killer is seen after the second murder, they are believed to be an incarnation of the very Ripper itself. They do not kill the witness and simply flee.

Identity
During One Piercing Note, the killer brutally murders Sister Elena and Sister Catherina. The player, Abbess Benita and troubadour Valerio create a plan to lure the killer to a new victim, Sister Cabbage, and catch her in the act. The plan works and, after a small chase, the killer flees up into the abbey's clocktower, where she takes Sister Debora hostage. She takes off their mask, revealing herself to be Sister Anna. Sister Debora explains that Anna murdered Isabella and disguised her body as herself. She claims to be the spirit of Saint Elspeth, killing those who go against the order's values, which in this case, is dancing. After she is stunned by the ring of the bell, Sister Debora manages to remove Anna's claws and throws them off the tower. The player then goes through a series of dialogue with Anna. In the end, she either gets kicked off the tower by the player, or jumps off herself.