Sierra Petrovita

Sierra Petrovita is a Nuka-Cola addict living in Girdershade in Fallout 3.. Ten years later, she can be found at the Nuka-World amusement park, on her ultimate Nuka quest.

Background
Sierra is young, attractive, blonde, and completely obsessed with Nuka-Cola and everything related to it. The causes of her obsession are unknown. It may have a psychotic background. Or it may be some kind of impairment. What is known is that Petrovita is addicted to Nuka-Cola and has been drinking the beverage in copious amounts for years. Her obsession started at the age of sixteen, and over the next ten years she threw away her parents' fortune on acquiring bottles of Nuka-Cola and its merchandise from merchants, travelers, and towns throughout the wasteland. She is largely incapable of holding a conversation without trying to steer the subject towards the soft drink. Her obsession would have likely killed her a long time ago, but it seems her beauty attracts men willing to risk life and limb to protect her. One such man is Ronald Laren, sharing Girdershade with her in 2277. Unfortunately, men are the last thing on Sierra's mind - unless they're bringing gifts in the form of Quantum Nuka-Colas...

Ronald helped her acquire some Nuka-Cola artifacts for her hoard, and has even joined Petrovita's Nuka-Cola Fan Club as its first (and only member). President, Recording Secretary and Treasurer Petrovite was delighted to have someone to share her obsession with, unaware of Laren's feelings for her. To her, he's simply a friend who keeps her safe from raiders.

Sierra managed to survive the treacherous Capital Wasteland and even expand her Nuka-Cola hoard... Erm, museum. By 2287, her obsession led her to the derelict Nuka-World, tracking down more artifacts for her collection. The ultimate goal is to win an ancient, forgotten contest: Find ten hidden Cappys in the park and meet Bradberton in person. He must be long dead, of course, but what matters to Sierra is becoming the greatest Nuka fan in the world... And preferably not get ventilated by raiders who claimed the park. They tolerate Sierra's presence as long as she keeps to the market. 

Quests

 * The Nuka-Cola Challenge: Sierra has her own Nuka-Cola "museum" (a display of her collection within her shack) which she gives tours in. After completing the tour she will give the player an ice cold Nuka-Cola and asks the Lone Wanderer to gather 30 Nuka-Cola Quantums for 40 bottle caps per bottle which adds up to 1200 caps. Completing the quest her way grants the Lone Wanderer good karma.
 * Mississippi Quantum Pie: After completing "The Nuka-Cola Challenge", she can make the player a Mississippi Quantum pie out of 1 Nuka-Cola Quantum, 1 bag of flour and 1 bottle of vodka.
 * Additional Nuka-Cola Quantums can be traded to Sierra for 50 caps each after "The Nuka-Cola Challenge" is completed.

Quests

 * Cappy in the Haystack: Sierra gives the player a long quest that leads to meeting the creator of Nuka-Cola, John-Caleb Bradberton.

Appearances
Sierra Petrovita appears in Fallout 3 and the Fallout 4 add-on Nuka-World.