Rebecca is the schools science teacher, who allies herself with Big Jim Rennie.
Rebecca and Jim hatch a plan to eliminate people they deem weak. They believe they can survive longer with less people.
Once its time to go through with releasing the virus to kill everyone, Rebecca begins to have second thoughts and can't go through with the plan. She is arrested by Julia and Barbie but set free shortly after.
After being set free, Rebecca becomes an ally to the town.