The Kingdom of Trenni is a small but economically significant nation in the world of Spice and Wolf. Trenni is best known for its silver coins, which are highly valued as a reliable currency in business and used in many regions adjacent to the kingdom.
The high amount of trust in Trenni silver makes any change in currency value risky. Nonetheless, during the events of Spice and Wolf, economic difficulties forced the Trenni royal family to authorize a devaluation of its silver currency. The potential economic privileges for whoever could collect and return a large amount of old Trenni silver coins to the royal treasury prompted a fradulent currency speculation scheme by Medio Trading. This scheme was eventually foiled by Holo and Lawrence, with Milone Trading obtaining the privileges first and then selling them to Medio for reasonable compensation.