Von Herder, a German inventor operating under the codename "Q," serves dual allegiances to MI6 and William James Moriarty’s network. Blending traits from Arthur Conan Doyle’s "blind German mechanic" in *The Adventure of the Empty House* and the James Bond franchise’s Q, he specializes in advanced firearms and mechanical engineering. Towering at 6'4" (193 cm) with pale skin and light blonde hair, he dons a black blindfold layered over a floral-patterned one—a subtle nod to debated visual capacities. His attire features a blue three-piece suit with a navy waistcoat, maroon tie, and gold chain, complemented by a mechanized silver-and-black cane serving both functional and aesthetic purposes. Renowned as a "gun freak" by associates like Sebastian Moran, he obsesses over weaponry innovation and thrives on solving technical puzzles. He actively monitors his creations during missions, gathering data to refine designs, though damaged prototypes or misunderstandings of his technical jargon provoke irritation. A dry wit surfaces in remarks such as his indifference to dark environments due to blindness. As a master gunsmith, Von Herder crafts stealth-oriented firearms like silenced rifles for clients such as Moran, evaluating combat efficacy through tactile assessment alone. His hands-on approach extends to field operations, including the Jack the Ripper case, where he observed his inventions firsthand. Despite pioneering超前時代の技術 (ahead-of-its-time technology) in mass-produced prototypes, their impracticality sparks concerns about real-world application. Professional tensions arise with MI6’s Miss Moneypenny, who resents his nocturnal workshop disruptions and lengthy technical lectures. His narrative remains fixed across media, anchored as a technical consultant bridging MI6 and Moriarty’s enterprises without expansion into spin-offs or adaptations.