Satoru (サトル) He is a typical overconfident hothead, and he wants to stop Specter because it sounds like fun. He is also Sayaka's brother. It is assumed they are twins as they are in the same grade. In Ape Escape: SaruSaru Big Mission he appeared as one of the hostage of Yellow Monkey, but Specter doll disguise itself and bring these microchips from Kakeru and Natsumi and hostage of Pink Monkey alongside of his sister Sayaka that Kakeru and Natsumi must rescue. There is a disambiguation page for him. (wikipedia)