Keith McGreggor was a mobile suit (MS) pilot for the Earth Federation who was assigned to border patrol before he was chosen to become a test pilot for Anaheim Electronics' SE Project at the Neofalia research facility in UC 0086. He was selected for his potent Newtype abilities, and it is soon revealed that he is the first of a new breed of super Newtypes. The term "Next One" is given to this new class of Newtypes. The unique abilities of Next Ones are integral to the control and function of the SE Generator system. During testing of the prototype Tyrant Sword in space, Keith encounters Paptimus Scirocco of the Jupiter Fleet testing his own prototype MS, the ABFS-RR-01S Messala Dinofaust Jupiter . After the Federation abandons Neofalia and the SE Project shut down, Keith is reassigned to a combat unit and the Tyrant Sword is never seen again.