Vidocq

A legendary investigator who appears to have died but continues to drive the case with relentless resolve. He is cunning, fearless, and willing to orchestrate feigned death to lure the Alchemist into revealing himself. His resilience and resourcefulness anchor the pursuit of truth through danger and deception.

A journalist seeking Vidocq’s biography and rumored murderer, who orchestrates the investigation from behind a charismatic facade. He is later revealed to be the Alchemist, using his social influence to manipulate events. This dual role creates constant moral ambiguity and tension with Vidocq.

Vidocq’s ally who aids the pursuit of Belmont and Veraldi and becomes a target in the Alchemist’s spree. He embodies loyalty and curiosity, helping connect clues across social circles. His death under supernatural circumstances raises the stakes for the investigators.

Owner of a cannon factory and a figure of vanity who becomes a victim in the Alchemist’s quest for blood and youth. His death triggers the investigation and underscores the dangers of wealth-driven arrogance.

Another factory owner drawn into the immortality scheme; his complicity and eventual demise illustrate how elite desires fuel the murderous plot. His fate emphasizes the moral blindness of privilege.

A dancer in a brothel who connects the letters and pins to the Alchemist’s plan. She is a crucial link between Vidocq, Boisset, and the victims, navigating danger with guarded courage.

Wife of Ernest Lafitte, entangled in the scheme and killed by the Alchemist to silence witnesses. Her involvement reveals the web of relations among the city’s powerful and compromised.

Officer assigned to probe Vidocq’s death who becomes wary of the Alchemist’s methods. He represents the enforcement side amid political intrigue and shifting loyalties.

A shadowy figure whose silence and presence heighten the mystery surrounding the underworld’s secrets. Her role adds an ominous, unseen tension to the investigation.

The brothel manager who supplies information about clientele and the Alchemist’s plans. She acts as a conduit for multiple perspectives within the criminal underworld.

Husband of Marine; a powerful, self-centered figure implicated in the pursuit of youth through wealth and influence. His actions contribute to the moral corrosion at the story’s heart.