Character guide

Don Luis Perenna

major

Also known as Perenna, Don Luis, Private Perenna, Don Perenna

Perenna moves through Parisian high society and police investigations alike, offering his brilliant deductions while a fortune in the Mornington inheritance hangs in the balance. He is a man of action and mystery, whose authority is constantly challenged by officials who suspect his true identity even as they rely on his genius. His desperate phone call from a hidden ceiling, warning of an imminent explosion, reveals both his physical daring and the mortal danger that shadows his every move.

Florence Levasseur

major

Also known as Florence, Levasseur, Mlle. Levasseur

She exists in a space between victim and suspect, her composure under Perenna's intense scrutiny suggesting hidden knowledge and conflicting loyalties. Perenna is drawn to her even as he suspects her of being the accomplice orchestrating attempts on his life, creating a painful tension between his desire and his instinct for self-preservation. Her connection to the elusive Gaston Sauverand makes her a pivotal, unpredictable figure in the race to uncover the killer and claim the inheritance.

Sergeant Mazeroux

supporting

Also known as Mazeroux, M. Mazeroux

As a man of the law, Mazeroux is bound by procedure and his duty to the Prefect, yet he is also Perenna's trusted assistant, caught between two worlds. His solid, often clumsy, presence provides a grounding contrast to Perenna's dazzling brilliance, and his genuine concern for his chief's safety is a constant reminder of the human cost of the investigation. He is the reliable, if sometimes bewildered, anchor in the storm of Perenna's high-stakes adventures.

M. Desmalions

supporting

Also known as Desmalions, Monsieur Desmalions

He operates at the highest level of the French justice system, responsible for the investigation into the Mornington murders and the safety of Paris. Though he respects Perenna's intellect, he is wary of his methods and the public's growing suspicion that his ally is the notorious Arsène Lupin. His decision to place Perenna under surveillance shows a man torn between using a valuable asset and containing a potential threat, making him a crucial gatekeeper in the official inquiry.

Gaston Sauverand

supporting

Also known as Sauverand, Gaston

He is the object of a frantic manhunt, a man whose flight with Florence Levasseur convinces Perenna of his guilt and his role as a rival for her affections. Sauverand is a ghost haunting the investigation, a name that inspires both fear and hatred in Perenna, who sees him as the architect of a deadly conspiracy. His past and his connection to the other victims hold the key to unlocking the entire plot, making him the central, unseen adversary in the early stages of the hunt.

Arsène Lupin

major

Also known as Lupin, Major Comte d'Astrignac, Comte d'Astrignac, Major d'Astrignac

Lupin is a specter from the past, a master of disguise and theft whose supposed death is as mysterious as his life. The public and the police see his hand in every brilliant deduction and audacious move made by Perenna, creating a legend that threatens to overshadow the man himself. His reappearance, whether real or imagined, raises the stakes of the Mornington case from a simple murder investigation to a national obsession, blurring the line between hero and criminal.

Marie Fauville

supporting

Also known as Fauville, Marie, Mme. Fauville, Madame Fauville

Marie Fauville is the widow at the center of a scandal that consumes Paris: her husband Hippolyte is dead, and the letters he left behind seem designed to destroy her. She is caught between grief, suspicion, and the damning posthumous accusations of a man who may have hated her enough to frame her from the grave. Her plight drives the investigation's moral urgency, forcing Don Luis Perenna to determine whether she is a victim or a killer before the case closes around her.

Deputy Chief Weber

supporting

Also known as Weber, Deputy Chief Weber, M. Weber

Deputy Chief Weber is the official investigator whose warrant for Don Luis Perenna reflects his conviction that the amateur detective is orchestrating the Mornington murders for profit. He embodies the institutional suspicion that dogs Perenna throughout the case, questioning his motives and challenging his methods at every turn. His presence raises the stakes of the early investigation, forcing Perenna to work against both a cunning killer and the weight of official distrust.

Hippolyte Fauville

supporting

Also known as Hippolyte, Fauville, M. Fauville

Hippolyte Fauville was an electrical engineer whose death opens the novel, but his presence lingers through letters he wrote before dying—letters that paint him as a 'hater' determined to ruin his wife Marie and the cousin who loved her. The Prefect of Police concludes that Fauville wrote those letters specifically to destroy them, a revelation that reframes the entire investigation. His calculated malice from beyond the grave makes him the case's most disturbing figure, and his posthumous accusations shape the early arc's central question: who is truly the victim?

Inspector Vérot

minor

Also known as Vérot, Inspector Vérot, Inspector V√©rot

Police inspector killed early in the investigation.

Valenglay

minor

Also known as M. Valenglay

Political figure involved in the case.

Cosmo Mornington

minor

Also known as Mornington, Mr. Mornington, Cosmo

Deceased millionaire whose will triggers events.

Jean Vernocq

minor

Also known as Vernocq

Suspicious character involved in criminal activities.

Señor Caceres

minor

Also known as Caceres

Spanish gentleman with a role in the story.

Maître Lepertuis

minor

Lawyer handling legal matters.

Armande Roussel

minor

Also known as Roussel

Member of the Roussel family.

Count Malonyi

minor

Foreign nobleman with ties to the plot.

Alexandre

minor

Servant or assistant to Don Luis.

Chief Inspector Ancenis

minor

Also known as Inspector Ancenis

Police chief involved in the investigation.

Davanne

minor

Associate of Don Luis or police.

Silvestre

minor

Minor character, possibly a servant or guard.

M. Langernault

minor

Also known as Langernault, Old Langernault, Daddy Langernault

Elderly man connected to the Fauville family.

Ermeline Roussel

minor

Also known as Ermeline, Roussel

Member of the Roussel family.

Edmond Fauville

minor

Also known as Edmond

Relative of Hippolyte Fauville.

Elizabeth Roussel

minor

Also known as Elizabeth

Member of the Roussel family.

Mme. Kesselbach

minor

Also known as Mme

Widow of a wealthy man, possibly connected to Mornington.

Victor Sauverand

minor

Also known as Victor, Sauverand

Relative of Gaston Sauverand.

Victor Roussel

minor

Also known as Victor, Roussel

Member of the Roussel family.

Nurse Gertrude

minor

Nurse attending to a character.

Dolores Kesselbach

minor

Also known as Dolores

Relative of Mme. Kesselbach.

Hubert Lautier

minor

Minor character, possibly a suspect.

Auguste

minor

Servant or minor functionary.