Nezumi Otoko, or 'Rat Man,' is a cunning, sly character from the anime series GeGeGe no Kitaro. As a half-human, half-yokai, Nezumi Otoko often finds himself caught between the world of humans and spirits. Known for his opportunistic nature, he frequently switches allegiances to benefit himself, leading to humorous and sometimes troublesome situations. Despite his selfish tendencies, he possesses a unique charm and often provides comic relief. His friendship with Kitaro, the main protagonist, is complex, filled with both camaraderie and betrayal, reflecting his ambiguous morality in the series.