Kai

Found by Rick Aller and Rosa the Second in a sunken submarine in the Sea of Lorelei, Kai survived over 24 years in suspended animation while in the cockpit of his Black Gundam X, and aided them in defeating a band of mercenaries that turned against Rosa. Finding it hard to believe that he has been asleep for so long, and that everything that he has known is no more, including the concept of NewTypes, he becomes enraged and starts to focus on the helmet and mask that he wore for 24 years. When the ship came under attack by a mercenary named Gaspa, mistaking him for a Space Revolutionary Army pilot due to his customized mobile suit is one that was in production and used by the SRA during the 7th Space War. Angered further by Rick's interference in the battle he turns his anger on the other pilot and wounds him only to lose consciousness himself as a result. Awakening to find the control unit for his Gundam X gone, Kai becomes further enraged with the crew of the Mirage and as it nears the ruins of a NewType lab, Kai leaves the ship and activates a hidden mobile suit from the ruins.

Using the powerful weapons of the Gundam Belphagor, Kai engages in battle with the crew and pilots of the Mirage, eventually destroying the ship and going off on his on. As he travels the broken waste land, he is approached by a strange man offering him a position with his group to bring about exactly what Kai is seeking... the destruction of the Earth.