The voice for Satan, provided by Parker, was inspired by the voice of the Pinhead character at the ending of the 1988 horror film, "", when Pinhead emotionally recalls his old life, when he was a good person. The animators went through several sketch drafts for Satan because, in Parker's words, "There's so many ways to go with him and we couldn't figure out the right one for a long time". The large and muscular look of the character stemmed from the fact that the script called for Satan to massively outweigh Jesus, and that look has persisted for the character throughout the rest of the series.