Domon Kasshu is the main protagonist of the anime series Kidou Butouden G Gundam. As a skilled martial artist and Gundam Fighter representing Neo Japan, Domon is tasked with piloting the Shining Gundam to compete in the 13th Gundam Fight tournament. His mission is not only to win the tournament but also to find his missing brother, Kyoji Kasshu, and stop the Devil Gundam, which threatens the peace of Earth and the colonies. Domon is known for his intense determination, fighting spirit, and growth as both a fighter and a person throughout the series.