Otto, once a traveling merchant, shifted careers to serve as a soldier at Ehrenfest’s city gate under Gunther’s command. His mercantile past equipped him with literacy and arithmetic, uncommon among soldiers, enabling him to manage administrative duties like paperwork and supply trades. These talents also led him to tutor Myne in reading and writing, compensating her with a secondhand stone slate and pencils for her aid in rectifying his account ledgers.

Initially aspiring to open a shop near Frenbeltag using discounted citizenship tied to his parents’ business, Otto forfeited the plan upon falling for Corinna, Benno’s younger sister. To wed her, he drained his savings for Ehrenfest citizenship and a soldier post, sacrificing his eligibility for formal merchantry to avoid guildmaster conflicts. He relocated to Corinna’s home on the Gilberta Company’s third floor, deeming the trade-off justified.

Though a soldier, Otto retained a merchant’s shrewdness, brokering deals and sustaining trade networks. He guided Myne in securing investors and artisans for her ventures, orchestrating her apprenticeship by connecting her to Benno. He cautioned Lutz against itinerant trade, stressing the perils of lost citizenship and status, nudging him toward a merchant’s path instead.

Family devotion defines Otto; he lavishes relentless praise on wife Corinna and daughter Renate, often testing listeners’ patience. He bartered nails for Myne’s shampoo recipe, later organizing a demonstration for Corinna. His rapport with Gunther blends casual mentorship and mutual worries over Myne’s fate, though Gunther sometimes bristled at her admiration for him.

Rising to lead the Gilberta Company, Otto’s obligations swelled during busy seasons, exacerbated by self-imposed overwork and a refusal to mentor aides, whom he deemed unfit. His merchant instincts and steadfast loyalty to Ehrenfest continued steering his professional choices and personal bonds, anchoring his identity amid evolving roles.