Chuck encounters Nikki and Tia Hernandaz in the Grumpy Dog Bowling Alley. He offers to escort the two women to the safe house, but they refuse to go anywhere without their friend Sharon Riesinger. Tia then goes on to explain that the three of them went to Las Vegas for Sharon's stagette, since she was getting married the next day. Unfortunately, Sharon was bitten by one of the dancers, but her friends were able to free her. The trio then fled the city only to be stopped by the blockade, and the soldiers took Sharon away. Tia tells Chuck that he should search the Quarantine Zone to see if Sharon is still there.
Chuck indeed finds Sharon at the military camp in one of the tents. She is still injured and asks for some Zombrex before going anywhere. Once injected with medicine, she then agrees to be brought to the bowling alley, where she is reunited with her friends. Once the three women are together, they are brought to the barricaded Brockett Gas Station.
Nikki shares a similar character model to Madison Lainey in Dead Rising 2. They also share exactly the same portrait in the Notebook (As shown in the game coding)