Rhiner Neumann commands the 4th Company of V601 under Tanya von Degurechaff’s leadership within the Imperial military, holding the rank of First Lieutenant. Equipped with standard-issue gear—an Elinium Type 97 ‘Mobile Assault’ Operation Orb, rifle, and aerial combat apparatus—he engages in battlefield operations clad in military uniforms or tactical armor. His round face, brown hair, dark eyes, and stocky frame define his physical presence.

Renowned for his lighthearted banter, Rhiner habitually needles comrades over their personal habits. During *Gekijōban Isekai Quartet ~Another World~*, he is thrust into a parallel dimension besieged by golems. Separated from the main force during an ambush, he allies with a splinter faction fleeing the onslaught, seeking refuge in a village overseen by a local named Alec. This group later converges with other displaced allies to address the interdimensional crisis, confronting rogue golems and destabilized realities.

Rhiner contributes to tactical countermeasures against the threats, including spearheading a plan to funnel golems into a massive pit via teleportation. His conduct aligns with his steadfast role as a disciplined subordinate in Tanya’s command structure, adhering to protocol while engaging in collaborative missions. His documented involvement remains confined to these events, with no elaboration on his origins or personal evolution beyond operational contexts.