 However, in "A Song of Ass and Fire" and "Titties and Dragons", they are paired together trying to get help from George R. R. Martin.Stan Marsh, voiced by and based on Trey Parker, is the most level-headed, mature and convivial of the four boys.Stan is generally kind, honest, smart, well-meaning, assertive, and often shares with his best friend Kyle a leadership role as the main protagonist of the show.