Infernal White Collar Criminals

Those who engage in acts of corporate theft, espionage, wage theft, fraud, embezzlement, etc.

Fixer
Agents of major industrial companies who do anything, from murder to theft to espionage, to serve the bosses. They are known to wield brown aether.

Merchant Underground
A major white collar crime syndicate that uses drenante.

Schiavista - primary drenante user / definitive white collar criminals
Those who wield drenante use ancient ledgers that track ownership of mercatorial contracts. They make deals with others in order to capture powers and abilities from them.