Sartorius, known as Takuma Saiou(斎王琢磨Saiō Takuma) in the original Japanese language version, is a fictional character in the Yu-Gi-Oh! GX anime series. His name is meant to be a pun in English, as "satori" denotes a "spiritual awakening". In the English version, Sartorius is voiced by the late Maddie Blaustein, while Takehito Koyasu (older) and Mayumi Yusa (younger) take the role in the Japanese version.