Brena Propulsion Designs is the engineering arm of the Jerhit Syndicate, founded by Brena Jerhit in Inland Thazvaar. Its core innovation is the reverse engineering of Solarn relay technology to create a private relay infrastructure serving the Inland. This is the only parallel relay network on the planet. Every relay that does not run on Solarn technology runs on Brena, and finding Brena technology outside of Inland Thazvaar or near imperial capitals means it was almost certainly acquired through illegitimate channels, as the construction cost is enormous and the engineering prints are not publicly available.

Beyond relay systems, Brena produces compact propulsion technology including jetpack suits and micro-cannons used by syndicate operatives, private warlords, and elites across relay-fractured regions. Much of the engineering knowledge behind these systems was taken from captured Berinese engineers. Kidnappings, ransom extractions, and forced prototype development are standard operations under Brena's oversight. The syndicate exploits the Solarn registry gap: inland unregistered people are moved through grey zone cargo channels and given identities built backward from nothing.

Brena Propulsion Designs is the only syndicate operation with access to the Solarn Contractor Registry, and that access runs through the company itself. Contracts that go through Brena are registered. Everything else the syndicate does is not. This makes Brena the point of entry between the Jerhit Syndicate and the legitimate economy.

Culturally, the syndicate funds anti-Shadow Rule music acts and weaponizes culture through syndicate-backed festivals. Genres like Rebelcore and Conwave glorify syndicate ideals, wealth, and pirate ascendancy. Independent acts are taxed. Narrative control is laundered through performance and sound, with the syndicate effectively controlling city rhythms and calendars across the Inland.