Dr. Eisenstein, known in Japan as Dr. Albert Zweinstein, is a ten time Nobel award-winning German physicist, specialized in Duel physics, with an IQ of 173. He is most famous for his quantum duel theory. Eisenstein arrives at Duel Academy under Prince Ojin's request and is sent by Sartorius to eliminate Jaden and retrieve his key to the mind control satellite although his underestimation of the young Duelist's tactics results in his failure. Bastion idolizes him for his unified theory of the world constituting a "beautiful space" and calls him a "god".