Sartorius, known in Japan as Takuma Saiou 「斎王琢磨, Saiō Takuma」, serves as the main antagonist during the second season. A fortune-teller with dual personalities under the influence of an alien force, he's poised to remake the world in the image most befitting the extraterrestrial radiance within him.

His name is meant to be a pun in English, as "satori" denotes a "spiritual awakening".