In the wake of Delilah's end of reign, Luella Price rounded up paid mercenaries for gruesome hits on the rebuilding teams across Dunwall. They wear rat masks to instill fear in their victims before slaughtering them with axes, knives and swords, leaving nightmarish displays akin to the Crown Killer.
Dishonored: The Peeress and the Price
A few months after Delilah's demise, Luella Price and the Rat gang slaughtered a third team of rebuilding workers. This time however, they left a single one alive to witness them and incite Empress Emily Kaldwin and Corvo Attano to investigate their string of murders. They also left a trail to one of them in the Distillery District in order to lure their pursuers.
Meanwhile, Luella and the gang abducts the democratic politician Archibald Wainwright in order to force him to represent Price's voice to the people. Later that night, they have two of them set explosives at the Dunwall Clocktower as long as special bonecharms to sap Emily powers and kill her in the blast.