Sierra's career, skills, and relationships with other townies are usually randomized at the start of the game. She is mostly interested in Culture, Politics, Travel, and Work. Sierra has the same facial structure as Brandi LeTourneau.
She has bronze talent badges in Flower Arranging, Robotics, and Cosmetology. Sierra's name is randomized when Bluewater Village is generated. The name "Sierra Tsvirkunov" is only referenced in the game files. She can be seen in one of the photos in the Tinker family album.