Orthrus

Orthrus (奴隷商会) was a prominent slave market based in the small kingdom of Ballachia. In addition to slaves, its business was diverse, handling weapons, drugs, monsters, and even artifacts. Its sphere of influence was based mainly around the Western Nations, with connections to virtually every nation in the world.

The organization was dismantled upon Yuuki Kagurazaka's orders, who deemed it risky for it to continue poaching monsters from the Jura Forest which came under Rimuru's full control after becoming a Demon Lord. The timing for crushing the organization happened to coincide with the unintended direction it was heading in, against the wishes of Yuuki. He used the Chosen Hero Masayuki as a proxy to expose the crime ring's activities, leading to the arrests of some of its leaders and those intimately connected to it. In Trinity in Tempest, one of the ring's leaders, Cockle, plays an antagonistic role against the main characters but is secretly eliminated by Diablo preceding the organization's collapse.