Sierra is a beautiful 26-year-old blonde who has no regard for anything but finding and consuming Nuka-Cola. She is absolutely fanatical about the blue drink and has been subsisting on the stuff for years. She has spent every bottle cap her parents left acquiring the drink from merchants, travelers, and towns spread throughout the Capital Wasteland. Even though her looks are a desirable target for men, her personality leaves much to be desired. She is so oddly fascinated by Nuka-Cola that she will constantly shift conversations to speak about it and cares little for anything else. This is the subject of much anguish for the only other inhabitant of Girdershade.
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.
She is the only non-player character known to be addicted to Nuka-Cola Quantum.
When you ask her what kind of recipes she can make with Nuka-Cola Quantum, she says it's so rare, she only knows one. However, when she sends you off to get the 30 Quantums, she may say "Maybe while you're gone, I'll whip up some of my Quantum Sorbet," implying she knows more than one recipe.
She can reveal the location of Evergreen Mills through dialogue if you ask her if there is anything else interesting in the area (she warns you to stay away from it).
If told about Ronald Laren's sexual intentions for her, she will ignorantly play it off as a joke on her.
pcps3xbox360 If you kill Sierra and then steal items from her house, she may protest, even though she is dead. [verified]
pcps3xbox360 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. [verified]
ps3 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. [verified]