A charming yet ruthless international arms dealer known as "the worst man in the world," who uses his charisma and business acumen to mask his criminal activities.

The head of a small enforcement agency and mentor to Jonathan Pine, Burr is determined to bring down Richard Roper through a covert operation.

Roper's mistress who initially appears to be a glamorous accessory but gradually reveals deeper complexities and motivations.

Roper’s cynical assistant, responsible for handling his illicit deals. Known for his wit and self-loathing, Corkoran is suspicious of Pine from the start.

A high-ranking official who supports Burr's investigation into Roper, driven by an idealistic vision for reforming intelligence services.

The mistress of Freddie Hamid and catalyst for the plot, whose decision to leak sensitive documents sets off a tragic chain of events.

Head of the Procurement Studies Group, a major antagonist whose actions reflect institutional corruption and opposition to Burr's mission.

A British diplomat in Cairo whose handling of sensitive information highlights systemic flaws within government institutions.

Burr’s methodical and loyal second-in-command, providing a steadying influence within the investigative team.

An American law enforcement officer collaborating with Burr, dedicated to fighting drug cartels despite institutional challenges.