Master PC
Master PC is a software program of mysterious origin. Its UI has the appearance of something that hasn't been updated since 1998, but that conceals its true capabilities. It can search for a specific person or object by name or characteristics such as height, weight, gender, or even proximity to the device that Master PC is installed on. The program specializes in mind control and body alteration, but can change even reality itself. Changes made are retroactive unless specified otherwise.