Kyoji Kasshu

Kyoji Kasshu (キョウジ・カッシュ Kyōji Kasshu?) is the older brother of Domon Kasshu and son of Raizo Kasshu. He is initially seen as the hidden antagonist of Mobile Fighter G Gundam and is the core unit of the JDG-00X Devil Gundam.

Personality
Kyoji is initially seen in the series as a heartless and ruthless villain bent on nothing more than world destruction and chaos. However, through Domon's flashbacks, Kyoji is a kindhearted and loving individual, though he is not afraid to be tough when the time is right and it is later proven that the rumors of his villainous nature was actually a lie. In truth, Kyoji and Domon had the same personality and Kyoji loved his brother.

Background
Kyoji Kasshu was one of the scientists working on the Ultimate Gundam along with his father Dr. Raizo Kasshu, a Gundam that would be more powerful then any developed before for the purpose of restoring the Earth. When Major Ulube Ishikawa of the Neo Japanese military, who decided to use the Ultimate Gundam for his own evil schemes, attempts to confiscate the Gundam, Dr. Kasshu tells Kyoji to take the Gundam to Earth to keep it out of the hands of the military. In the ensuing chaos, Domon's mother was fatally shot when she shielded Kyoji from the gunfire from one of Ulube's soldiers as her son evades the Neo Japan military to Earth while his father is sentenced as a scapegoat. However, the force of the landing on Earth corrupts the Ultimate Gundam's programming, believing that killing all humans is the only way to save the Earth as it absorbs Kyoji as its core, infecting him with DG Cells and using him to do its bidding. However, using what little free will he has left, Kyoji use the DG Cells on a corpse of a man killed by the Devil Gundam, reanimating it into an android in his image, Schwarz Bruder in order to help Domon grow as a fighter and prepare him when the time came to end his life. By the time Domon finds his brother at the ruin of Shinjuku, Kyoji is a shell of his former self when Domon attempts to reason with him. During the battle absrobs the power of Domon's Shining Finger Sword in order to fuel the Devil Gundam's second evolution. Due to the interference of Schwarz Bruder, Domon is able to build himself up enough to take on his brother again and believes to have killed him during the battle at the Guyana Highlands. However, the Devil Gundam survived and is brought to Neo Hong Kong by Wong, with Kyoji's near-death body still in its core as Wong and Master Asia were searching for a new life core unit to replace him. During the Battle Royale on Lantau Island, Schwarz attempts to get Kyoji out of the weakened Devil Gundam, only to be grabbed to take his creator's place as he orders Domon to kill them both. Having finally reconciled with his brother, Paul Gekko came in and uses the RX-79-9 Banshee Gundam's beam rifle to free Kyoji and Schwarz, seemingly destroying the Devil Gundam. When Paul Gekko founds Kyoji injured very badly after the two Kyojis are one, Paul Gekko attempts to heal Domon's Brother with his medical ninjutsu but it was too late. With his final words, Kyoji admires love to Domon as a Brother and tells Paul Gekko to take care of Domon, and become a true friend to his Younger Brother. Domon Kasshu mourns over his brother's body. Paul Gekko comforts Domon because Paul has suffered the same fate with his Older Brother.