Captain Spade

Thomas Roch

Captain Spade is a pirate officer tasked with transporting and securing Thomas Roch.

Healthful House

A French inventor of genius, now mentally unstable, confined to Pavilion No. 17 at Healthful House. He is obsessed with his fulgurator invention and guards its secret even in his madness.

Count d'Artigas

Accompanies the Count, examines the park and paths around Pavilion No. 17, and exchanges meaningful glances with the Count.

Count d'Artigas

The mad French inventor, obsessed with his fulgurator, refuses to sell his secret for less than billions and exhibits signs of an impending fit.

III: Kidnapped

Leads the kidnapping operation, having stolen the key and unbolted the door earlier.

III: Kidnapped

The target of the kidnapping; is incapacitated by a fit and lies on a sofa in the pavilion.

The Schooner Ebba

Commands the Ebba; assists the boarding officers in their search and later retrieves a buoy that tows the schooner.

The Schooner Ebba

The missing inventor; the search of the Ebba fails to locate him.

V: Where Am I?

Fellow captive; Simon deduces he was also kidnapped, likely for his fulgurator secret.

On Deck

The inventor, visibly mad; fails to recognize Simon Hart, becomes agitated by the ship's movement, and suffers a violent fit.

On Deck

Captain of the Ebba; watches Thomas Roch closely and orders sailors to restrain him during his fit.

Two Days at Sea

Commands the Ebba; orders Hart away from the bows and later orders him below; maneuvers the schooner to avoid a warship and approach a merchantman.

Two Days at Sea

The kidnapped inventor; suffers a fit and is attended by Hart; his fulgurator is the likely motive for the kidnapping.

Back Cup

Goes forward with d'Artigas and Serko to maneuver the schooner and retrieve the buoy marking the submerged entrance.

Back Cup

Mentioned as being placed in a similar compartment to Hart during the transfer into the tug.

Inside Back Cup

Present with Count d'Artigas and Serko.

X: Ker Karraje

Accompanies Ker Karraje when he confronts Simon Hart.

X: Ker Karraje

Mentioned as the inventor of the fulgurator, which Ker Karraje seeks to obtain.

XI: Five Weeks in Back Cup

His mental condition improves; he is kept away from Hart and is being courted by Serko to reveal his fulgurator formula.

XI: Five Weeks in Back Cup

Departs with Ker Karraje and Serko on the tug, likely for a piracy expedition or to fetch materials.

Engineer Serko's Advice

Works in his laboratory preparing the explosive; has not yet revealed the deflagrator's secret.

God Be with It

Works in his laboratory; his fulgurator is used to blast the tunnel.

Battle Between the Sword and the Tug

The inventor; is rescued from captivity but remains bound during the escape attempt.

XV: Expectation

Survived the collision and has returned to work in his laboratory; his fulgurator engines are being installed for defense.

XV: Expectation

Mentioned as conferring with Serko about the defensive situation and the possibility of abandoning Back Cup.

Only a Few More Hours

Remains deluded, believing he is the rightful owner of Back Cup and its treasures, refusing to accept that he is a prisoner of pirates.

One Against Five

Initially launches engines to destroy a cruiser; refuses to fire on the French ship upon seeing the tricolor; crushes the phial and flees into the passage.

One Against Five

Among the pirates threatening Roch; present at the trestle during the attack.

On Board the Tonnant

Moved by the sight of the tricolor flag, he deliberately caused the explosion that destroyed Back Cup, himself, and Ker Karraje's pirates.