Knock Knock is a resident of Little Lamplight and is the younger sister of Knick Knack. She claims that her job around Little Lamplight is to make sure everyone upholds the law and to keep a high morale.
Knock Knock is apparently the only person in Little Lamplight who doesn't show aggression towards the player. She will treat you with respect and wishes to learn your story. You can tell her some of the main aspects of the game. The player can tell her the story from a good, evil or neutral point of view. She will then tell this story to everyone else in Little Lamplight. If you have completed the Take it Back! quest and has the Broken Steel DLC, you can tell her how your story finished.
She will tell the player a knock knock joke if requested. When she has finished the joke you can pass a Speech check that will allow you to say you liked the joke. You will gain karma. This is repeatable and so the player can continue to use this to gain the Silver Tounged Devil Achievement/Trophy.
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