Luella Price is the violent leader of the Rat Gang introduced in the first issue of Dishonored: The Peeress and the Price and the story's main antagonist. She wants to bring anarchy to Dunwall in order to seize its rule.
In the wake of Delilah's overthrown reign, Luella formed the Rat Gang to impede the renovation projects initiated by Empress Emily Kaldwin throughout Dunwall. She wants a return to the chaos wrought by the previous ruler, judging a reforming of Dunwall as unnatural. To do so, she started to murder gruesomely the rebuilding teams. She enjoys violence and chaos and does not hesitate to apply them to meet her ends. She is also aware of Emily's powers and knows how to negate them.
Dishonored: The Peeress and the Price
A few months after Delilah's reign, Luella Price left a worker alive to witness her third slaughter of the rebuilding teams. Acting this way, she hoped to encourage Emily and Corvo Attano to investigate her string of murders. Leaving enough hints to lead her opponents, she then prepared a time bomb at Dunwall's Clocktower, rigged with a swarm of special bonecharms to sap Emily's powers.
Meanwhile, Luella abducts Archibald Wainwright, an active politician advocating a democratic rule on Dunwall and the rest of the Empire. She roughs him up before explaining her plans of an anarchic rule. She then forces him to participate in her plans by gaining the people's voice.