Red McArthur (previously known as Bertha and Rebecca), is a female fourth-grade student at South Park Elementary who made her first appearance in "Cartman Gets an Anal Probe". She is, arguably, the fourth-most prominent female character in the fourth grade, behind Wendy, Heidi, and Bebe. Frankly, she is also the only girl in Wendy’s friend group who has not gotten her own episode. Everyone sees a lot of potential in her to have at least one episode