Sovereign Co.

Sovereign Co. is the Celvice-established equivalent of Sylph Co. from Kanto. As such, the multi-purpose company serves several purpose in the region, such as but not limited to Pokemon researches, product manufacturing and research expeditions. Sovereign's headquarter is located in Velo city.

Good or Evil? (spoilers bellow)
Sovereign Co.'s position in the Celvice economy has often been put in question by Tiamat as soon as it became more and more established and detailed during Plasma's development. The company started as a relatively similar clone of Sylph Co. but eventually grew into what looks more like a controlling monopoly involved into various shady business.

The company is also responsible for the creation of the man-made Pokemon Valloroy, which is essentially a weapon of war with built-in firearms. The basic idea isn't too much unlike Porygon, which was created by Sylph but the difference lies in the fact that Sovereign uses Valloroy as a personal defense unit to guard their headquarters while Sylph distributed Porygon to be used by trainers for competitive purpose.

Zee also heavily insisted on the fact that Sovereign is ran by Silver, which is one of the only few characters from other regions to be present in Pokemon Plasma. Why not Gary, or Cheren or even Wally? Tiamat questioned Zee on his choice to use Silver for this position but Zee insisted.

Zee never confirmed the reason for his choice but it is believed that this decision is intentional to create more ambiguity about the company's true intentions, due to Silver's background story.

Notable Products
As mentioned earlier, Sovereign Co. creates several products with more or less important influence on the hero over the course of the game, such products include:
 * The PokeDOC
 * The ItemDOC
 * Sovereign Balls
 * Valloroy
 * The "Help System"

Joining Sovereign Co.
Zee mentioned that the hero would be proposed to join Sovereign at some point into the story. Doing so is said to have no major impact on the storyline, but allow access to several new sidequests. Little details are currently known about this mechanic.