The Cyber Emperor is the King of the Cyber Men and he is the main antagonist of The Sinner. Originally the first companion of The Sinner known as Jeff he was a kind and care free individual studying at the university of Phoenix Arizona where he met The Professor and the two struck a strong friendship traveling to many foreign planets however it was brought to an end when Jeff was infected by cyber nanites that converted him into the most advanced Cyberman in history going as far as to designate himself as "The Cyber Emperor". Devastated but unable to bring himself to kill Jeff or The Cyber Emperor, The Sinner trapped him and his cyber horde on a once human colonized planet now known as Cybertron.