What protagonist in the thirteenth season of "South Park" has an oft-muffled and indiscernible speech?
South Park (season 13): The thirteenth season of "South Park", an American animated television comedy series, originally aired in the United States on Comedy Central between March 11 and November 18, 2009. South Park (season 13):  The season continued to focus on the exploits of protagonists Stan, Kyle, Cartman, Kenny and Butters in the fictional Colorado mountain town of South Park. Kenny McCormick: Kenneth "Kenny" McCormick is a main character in the animated adult television series "South Park", along with his friends Stan Marsh, Kyle Broflovski, and Eric Cartman. Kenny McCormick:  His oft-muffled and indiscernible speech—the result of his parka hood covering his mouth—is provided by co-creator Matt Stone.
Kenneth "Kenny" McCormick