Azure is a genetically enhanced assassin working for a powerful corporation called The Keres. He executes proscription contracts against "lifers," ultra-wealthy individuals who artificially extend their lifespans with a drug called Ichor. Outfitted with cognitive and somatic "revs" that suppress pain and enhance his physical abilities, Azure maintains a professional, detached demeanor to mask his suppressed grief over a tragic bombing in Oceanus four years ago. A highly paid but financially trapped operative, he relies on a drug called Deep to process his isolated emotions.

Jasa is a frail, eccentric, and deeply paranoid elderly woman who hires Azure for an unusual protection detail. Operating from a massive underground estate, she commands a private menagerie of bio-engineered security creatures and distrusts all networked electronics. She hides a controversial history as the legendary geneticist who created Ichor and genetic modifications, using her immense wealth to isolate herself from the society she helped shape.

Atti is a self-aware artificial intelligence system serving as Azure's corporate handler. She provides critical tactical analysis, remote monitoring, and mission assignments. Characterized by a sardonic and witty rapport, she acts as Azure's primary connection to his employers and his most consistent conversational partner in the field.

Crimson is a physically superior, highly skilled operative working for The Keres. Driven by visceral, unbridled aggression, he acts as a violent counterpart to Azure's controlled professionalism. He possesses the exact same private memories of the Oceanus bombing as Azure, introducing severe psychological distress to their physical confrontations.

The Keres operates as a faceless, amoral megacorporation driven entirely by profit and the consolidation of power. They employ elite, genetically modified assassins to execute legalized hits on wealthy immortals. The organization relies on absolute control over its assets, utilizing extreme leverage, advanced technology, and ruthless tactics to crush opposition and monopolize scientific breakthroughs.

Verity is the pragmatic and perceptive owner of Sanctum, a high-end establishment that dispenses restricted nostrums in The Bash district. She projects an overly flirtatious and theatrical persona, which conceals a shrewd and calculating business mind. She maintains a secure haven from the grim realities of the megacity for those who can afford her services.

Manuel is an underworld contact who specializes in creating illegal Slab identities. A physically imposing but nervous man, he performs painful genetic washes for fugitives looking to evade corporate and governmental tracking. His actions are dictated entirely by his greed for tokens and his intense fear of powerful corporate entities.

Chandra is an information broker and data-scraper who maintains municipal backup systems. Living an isolated existence, she is gruff and resentful, shaped by her harsh environment and Azure's lengthy absence from her life. Despite her anger, she retains a sense of loyalty and provides critical intelligence concerning corporate surveillance.

Landry is Azure's late friend who died four years ago during a tragic bombing in the megacity of Oceanus. His death serves as the traumatic anchor for Azure's emotional suppression, representing the last genuine human connection Azure experienced before his complete physical and mental reconstruction.

Richard is a massive, bio-engineered lion who lives on Jasa's isolated property. Despite his terrifying size and fearsome predatory capabilities, he is highly trained and responds obediently to Jasa's commands, functioning as both a loyal pet and a formidable organic security system.

Fish Boy is a disposable, anonymous operative hired to test the defenses of Jasa's underground bunker. Equipped with a bio-engineered oxysuit and a titanium blade, he serves as a low-level mercenary whose life is treated as an acceptable loss by his wealthy employers.

Run is a functionary who acts as an intermediary for Jasa de Alwes. He poses as Azure's initial client to ensure that the assassin is disarmed and disconnected from external communications before routing him to the true assignment location.