Live action TV
Description
Doktor G is a prominent antagonist from the 1973 film Kamen Rider V3 tai Destron Kaijin, serving as a high-ranking general for the evil organization Destron. Hailing from Germany, his past is deeply rooted in the dark chapters of 20th-century history. He is characterized as a former Nazi military officer who served under Erwin Rommel during World War II, a period in which he first gained a reputation for his brutality. After the war, he lived in an old castle, the Scorpion Mansion, near the Rhine River, where he devoted his time to the study of scorpions and the practice of black magic. This background paints him not just as a simple thug, but as a figure of aristocratic bearing and sinister intellect.

In terms of personality, Doktor G is defined by a potent combination of cruelty and a peculiar sense of personal honor. He is immensely arrogant and confident in his own abilities, believing himself capable of annihilating his enemies with a single blow. Despite his villainous nature, he adheres to a self-imposed chivalric code and philosophy, viewing combat and destruction as the engines of progress. This complex characterization is further enhanced by a distinctive verbal tic; he dramatically elongates the name of his nemesis, delivering a drawn-out cry of "Kamen Raaida V3" that was a deliberate addition by his portrayer to give the character a unique theatrical presence inspired by kabuki.

Doktor G's primary motivation is to fulfill the will of Destron's Great Leader by conquering Japan and destroying Kamen Rider V3. He is dispatched from the German branch of Destron specifically to lead the organization's Japanese operations, taking command of the Mechanical Army, a group of kaijin created through a fusion of black magic and technological science. His role in the story is that of a major field commander, responsible for orchestrating numerous schemes against V3. His most audacious plan involved resurrecting four key executives from the former Shocker organization, bringing them back to form a powerful council to defeat the heroic Rider.

Throughout his campaign, Doktor G relies on an impressive arsenal of personal abilities and equipment. He does not typically transform into a monster for battle, instead wearing a suit of ancient knight's armor and a scorpion-shaped helmet that signifies his allegiance. His primary weapons include a powerful battle axe that can split a target from two hundred meters away, a shield that can block bullets and deploy deadly poison, and a sword said to have been quenched in dragon's blood that can summon lightning. With this gear, his combat prowess is such that he can fight Kamen Rider V3 on equal footing without needing to transform into a larger, monstrous form.

Key relationships define his narrative arc. He serves the mysterious Great Leader of Destron, and his failures in the field gradually cause him to lose the Leader's trust and favor. His relationship with his enemies is strictly adversarial; he is a recurring and personal foe to Shiro Kazami, the hero who transforms into Kamen Rider V3. The character undergoes a significant development arc driven by desperation. After a string of failed operations and the destruction of his monster laboratory, he is cornered and stripped of his status. In a final act of redemption in the eyes of his masters, he sets a trap for V3 and, for the first time, unleashes his true power. He summons the spirits of evil warriors to transform himself into his monstrous true form, a crab-like kaijin known as Kani Razer, or the Crab Laser.

In this transformed state, Doktor G gains a new set of monstrous abilities. As Kani Razer, he can fire a powerful energy beam known as the Scorpion Laser from his head and use magic to plunge the surrounding area into darkness. This final, desperate battle represents the culmination of his character, as he fights with everything he has to restore his honor. Ultimately, even this formidable form is not enough, and he is finally destroyed by Kamen Rider V3's finishing move, the V3 Tailspin Return Kick, marking the end of his ambition.