TV-Series
Description
Professor G is one of the five original Gundam scientists who rebelled against the Earth Sphere Alliance and its private army, OZ. He is the engineer responsible for creating the XXXG-01D Gundam Deathscythe, a mobile suit specializing in stealth and close-quarters combat, which he often refers to as "the ultimate work of art". Physically, he is distinguished by his long nose, a thick, mushroom-shaped hairstyle, and a prominent scar on his cheek. He is a member of the Sweeper group, a spacefaring organization of salvagers and information brokers.

Professor G has a sardonic and eccentric personality, similar to his colleague Doctor J. His primary motivation is to resist the oppressive rule of the Alliance and OZ, initially through the original Operation Meteor plan. However, he is pragmatic and adaptable. When his protégé, Duo Maxwell, refused to participate in the original plan and attempted to destroy the Deathscythe and himself, Professor G caught him in the act. Rather than stopping him, he encouraged Duo to steal the Gundam and fight the Alliance on his own terms, demonstrating a respect for individual conviction over blind adherence to a failed plan. This action defines his role as a mentor who empowers his student to find his own path.

His most significant relationship is with Duo Maxwell. Impressed by the boy’s ability to crack his security codes, Professor G took Duo in and trained him as a pilot for the Deathscythe. This bond is central to his character, as he shows a clear, if gruff, paternal concern for Duo. In the series, his role extends beyond that of a single creator. He and the other four Gundam scientists are captured by OZ and forced to work for them on the lunar base. There, they build the advanced mobile suits Mercurius and Vayeate for their captors while secretly repairing and upgrading the Deathscythe and Shenlong Gundams for their pilots. This duplicitous work shows his cunning and unwavering commitment to the Gundam pilots' cause.

Throughout the story, Professor G does not undergo a dramatic personality shift, but his perspective broadens. He begins as a key architect of a grand, destructive plan for colonial independence. After witnessing the pilots' actions and the escalating chaos of war, he and the other scientists ultimately seek atonement. In the final battle of the Eve Wars, they sacrifice their lives by deliberately exposing themselves to radiation to restart the engines of the battleship Peacemillion, using it to push the falling space fortress Libra away from Earth. His notable abilities lie entirely in his genius-level intellect and engineering skills. He is a master of mobile suit design, with a particular expertise in stealth systems. He is also a proficient strategist, capable of coordinating with his fellow scientists to build powerful new machines while simultaneously deceiving the enemy forces that hold them captive.