Rhiner Neumann commands the 4th Company of the V601 battalion under Tanya Degurechaff, holding the Imperial rank of First Lieutenant (Oberleutnant). He displays a stout build, round face, brown hair, and dark or olive eyes, consistently appearing in military or combat attire. His personality blends playfulness with sincerity, frequently teasing comrades about their lifestyles while earning their respect. He maintains deference toward Commander Degurechaff and fosters positive rapport with fellow officers. In combat, Rhiner employs aggressive tactics, leading frontal assaults with his unit. He achieved the feat of slicing through a Polikarpov I-16’s wing with his bayonet. His operational history includes the annihilation of Dacia, the Osfjord landing, Western Front campaigns against the Francois Republic, North African deployments, and Eastern Front battles against the Russy Federation. He retained command during the 203rd Battalion’s integration into Kampfgruppe Salamander. Within the crossover, his mischievous side emerges through collaborations, notably joining Kazuma Satou, Vooren Grantz, and Wilibald Koenig to steal "red stuff" (alcohol) from a principal's office. He bypassed security, physically fought summoned giant toads—even enduring temporary consumption by one—before the group’s discovery led to detention.