Katy Kimbrell is one of the pre-made hostesses in Downtown from The Sims 2: Nightlife. The other two pre-made hosts are Andrea Fleig and Joseph Ng. She can be made playable by befriending her and asking her to move in, or by marrying her.
Katy has the same facial structure as Marsha Bruenig. Her name is randomized when Downtown is generated. The name "Katy Kimbrell" is only referenced in the game files. According to Katy's SimDNA in SimPE, her hair was red before it turned grey.