Shelley Linker (The Darcy Miniseries)

Shelley Linker is the main antagonist of the 2014 live action film, Cooties. She is a school girl from Ft. Chicken Elementary School, and the cause for the spread of the virus in the school, which she herself had unknowingly gotten from eating a contaminated chicken nugget. She is also the leader of the kid zombies. After being revived from the dead, she is one of the three tritagonists of The Darcy (miniseries).