Saccharomyces cerevisiae is a microorganism character in Moyashimon, depicted as a yeast with a distinctive, anthropomorphic presence. In the series, it represents sake and bread yeast, making it important in fermentation-related episodes and educational moments. The character helps explain microbiology in a playful, approachable way while reflecting the series’ focus on microbes and food science. As one of the recognizable microbial cast members, it adds humor, personality, and scientific context to the story.