The voyageur culture, which formed the physical workforce of the trade, was predominantly French-Canadian and carried with it specific cultural characteristics: Catholicism, specific musical and oral traditions, a pattern of family formation that regularly crossed the boundary between European and Indigenous communities.

Mixed-heritage families like the Dorions were not unusual.

They were, in many respects, constitutive of the fur-trade frontier itself.

Marie Dorion occupied a specific position in this world.

As an Ioway woman partnered with an interpreter of mixed French-Canadian and Sioux heritage, she was both a product of the frontier world and a contributor to it.

Her language skills — she spoke Ioway and apparently some degree of French, and possibly other languages acquired through the trade — were directly useful in the work of the enterprise.

Her knowledge of Indigenous social protocols made her an effective mediator in the cross-cultural situations that the trade constantly created.