 He was also the one to let Butters know that freezing oneself in the snow was actually not a good idea when Butters helped Cartman to do so in the episode "Go God Go".Fillmore Anderson is a kindergartner who is sometimes featured in small roles in a variety of episodes, particularly where younger students are featured.He is revealed in "Trapper Keeper" to be the nephew of Rosie O'Donnell.