Sierra Petrovita

Sierra Petrovita is a Nuka-Cola addict living in Girdershade in 2277 and Nuka-World in 2287.

Background
Sierra was born in 2251. She is a fair-haired 26 year old woman who shows little regard for matters outside consuming and hoarding Nuka-Cola and collecting merchandise relating to it, much to the dismay of her neighbor Ronald Laren, who remains in Girdershade in the hope of seducing her. Her fanaticism for the drink is without question, as she subsists solely on it. She has spent every bottle cap her parents left her acquiring the drink from merchants, travelers, and towns spread throughout the Capital Wasteland.

In the Fallout 4 add-on Nuka-World, 10 years later, she has traveled to an amusement park west of Boston, Nuka-World.

Daily schedule
Sierra stays in her house all day drinking Nuka-Cola and doing other miscellaneous things. In addition, she hounds passing travelers for any trace of Nuka-Cola Quantum.

Fallout 3

 * 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 Lone Wanderer an ice cold Nuka-Cola and asks them to gather 30 Nuka-Cola Quantums for 40 bottle caps per bottle which adds up to 1200 caps. Completing the quest her way grants good Karma.
 * Mississippi Quantum Pie: After completing "The Nuka-Cola Challenge," she can make the Lone Wanderer a Mississippi Quantum pie out of 1 Nuka-Cola Quantum, 1 bag of flour and 1 bottle of vodka.

Fallout 4

 * Cappy in a Haystack: Sierra asks the Sole Survivor to find 10 hidden Cappy images in the park. TBA

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

Bugs

 * If you kill Sierra and then steal items from her house, she may protest, even though she is dead.
 * If you fight any creatures outside of Sierra's house and then enter Sierra's house, you will not be able to communicate with her because she is fleeing. If you enter her house while enemies are still nearby, she will flee the house and disappear forever. Sometimes, she may run for cover at another house in Girdershade and can be found there, rather than fleeing town.
 * If you plant an explosive on Sierra and then ask her to make a Mississippi Quantum pie, she will start making it, but explode during the process. The player is stuck waiting for it to be made. Loading a previous save fixes this problem.