Sartorius, known in Japan as Takuma Saio (斎王 琢磨 Saiō Takuma), serves as the main antagonist during the Society of Light arc in the Yu-Gi-Oh! GX anime.He is a fortune-teller and, under the influence of The Light of Destruction, he was poised to remake the world in the image most befitting to the extraterrestrial entity. His usual outfit consists of the standard Obelisk Blue uniform with a raised and buckled collar and matching cut-offs for his arms and legs. A Deck box is strapped to his right leg, presumably to house his regular tarot Deck. His blue hair is sectioned in two layers, the layer closest to his face a lighter shade of blue than the one behind it, which generally flows as a single unit. Directly above his nose is another section of hair, colored grayish white, and he also wears earrings and a pair of ornaments on either side of his forehead. He carries an Academia Disk on his left hand despite his initial preference of Dueling on a table, even claiming to have never used a Duel Disk before prior to Dueling Hassleberry.