Described by Trey Parker as "that kid who's always ruining the show", Kevin is a Sci-Fi fan who is often seen playing role-playing games based on the Star Wars or Star Trek series. He is often seen at lunch with Red in earlier episodes, and Bradley Biggle in later episodes.
Though he was present during the boys' game of Lord of the Rings and briefly when Butters Stotch infiltrated the girls' lair, his most notable appearance was as a member of Eric Cartman's Pirate Crew, where his lightsaber helped win over a French ship. He also joined Cartman's forces for Black Friday and when Clyde Donovan took the Stick of Truth.
In the second season he was said to be Chinese, but the parents shown with him in the show and the game are white. It's possible he is adopted.
He bears a strong resemblance to Esther, who many fans believe to be his sister.