Why did Billie Lurk betray Daud?

It is revealed at the end of the DLC that Billie betrayed Daud to Delilah, and planned to murder him herself. Believing he had grown weak and unstable after the assassination of Jessamine Kaldwin, Billie decided to unseat him as the leader of the Whalers and take his place.

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And another question, how do you steal daud's pouch?

How is Delilah alive in Dishonored 2? When she returns to the world, Delilah hides her spirit within a statue, thus ensuring herself immortality. She and Duke Luca Abele later stage a coup at Dunwall Tower, in the middle of a ceremony honoring Jessamine's assassination.

Keeping this in consideration, is emily related to corvo?

Emily Kaldwin is a fictional character of the Dishonored series. In the story of the first game, she is the daughter of the Empress and the player-character, Corvo. How tall is Corvo? According to Gameinformer, Corvo stands at 6'4" (1.93 meters) tall.

Is Corvo or Emily better?

Choose Corvo if you want to take your time plotting quick, precise movements and don't mind the limited reach of Blink. Choose Emily if you want to feel a bit more like a Heretical Spider-Man physics god with a higher chance of being spotted. Subsequently, does killing matter in dishonored? The Dishonored series takes a broader approach to death: all enemies and civilians fall into the "killable but you shouldn't" category. Kill any character in the game, and it will raise your "chaos" level, because of the destruction that death causes through the world.