Character Relationship Map: Steamboy

Characters

• Ray's Mother (played by Keiko Aizawa) — protagonist
• Scarlett O'Hara St. Jones (played by Manami Konishi) — supporting

  A spoiled granddaughter of the foundation's chairman who meets Ray in London. She is attracted to him, becomes involved in the crisis aboard the floating fortress, escapes with him, and later matures...

• James Ray Steam (played by Anne Suzuki) — supporting

  A maintenance boy in Manchester who receives a powerful steam device and is instructed to guard it. He becomes entangled in the struggle over the Steam Castle, questions the morality of technological...

• Dr. Edward 'Eddy' Steam (played by Masane Tsukayama) — supporting

  A scientist severely scarred and mechanized after a steam experiment in Alaska. He helps build the Steam Castle and its war machines, but his ambition turns the exhibition into a battlefield. After re...

• Dr. Lloyd Steam (played by Katsuo Nakamura) — supporting

  A scientist who helped discover the mineral water powering the steam technology. He sends the device to Ray, attempts to sabotage the Steam Castle after learning its military purpose, and ultimately r...

• Robert Stephenson (played by Kiyoshi Kodama) — supporting

  A railway and technology figure whom Ray briefly meets on a train. Ray later gives him a Steam Ball and information learned in captivity, but realizes that his company also intends to use the technolo...

Canonical Relationships

Family, romantic, and professional connections based on plot evidence.

• Ray's Mother → James Ray Steam (mother)
• Robert Stephenson → Dr. Lloyd Steam (Professional Technological Counterpart) — Their connection reflects the conflict between industrial advancement and scientific ethics.

  Stephenson receives the Steam Ball and applies it to his company's tanks, while Lloyd opposes the military use of the technology.

• James Ray Steam → Scarlett O'Hara St. Jones (Romantic Love-Hate Friendship) — Their antagonistic attraction develops into a cooperative emotional bond.

  Ray develops a love/hate friendship with Scarlett, who seems attracted to him, after meeting her in London.

• James Ray Steam → Robert Stephenson (Professional Scientific Contact) — Stephenson is Ray's intended external contact and recipient of the Steam Ball.

  Lloyd instructs Ray to deliver the Steam Ball to Robert Stephenson, and Ray briefly meets Stephenson on a train before being captured.

• Dr. Lloyd Steam → James Ray Steam (Family Grandfather) — Lloyd acts as Ray's grandfather, guardian figure, and scientific mentor.

  Lloyd sends the Steam Ball and its schematics to his grandson James Ray Steam and instructs him to guard it.

• Dr. Lloyd Steam → Dr. Edward 'Eddy' Steam (Family Father) — Lloyd and Eddy are father and son divided by the intended use of their inventions.

  Lloyd is described as Eddy's father and works with him on the discovery of the pure mineral water. Lloyd later confronts Eddy as his actions threaten...

• Dr. Edward 'Eddy' Steam → James Ray Steam (Family Father) — Eddy is Ray's estranged father, and their family bond is tested by opposing scientific ideals.

  The plot identifies James Ray Steam as Eddy's son. Ray later confronts Eddy over the militarization of the Steam Castle.

Story Dynamics

Alliances, conflicts, and narrative interactions that evolve throughout the story.

• Dr. Lloyd Steam → Scarlett O'Hara St. Jones (Conflict Ideological Opponent) — Lloyd's opposition to the Foundation places him against Scarlett's social and family environment.

  Lloyd opposes the Foundation's plan to sell weapons at the exhibition, while Scarlett is connected to the Foundation through her grandfather.

• Scarlett O'Hara St. Jones → Dr. Edward 'Eddy' Steam (Social Foundation Associate) — Scarlett is socially connected to the organization supporting Eddy's project.

  Scarlett is introduced as the granddaughter of the Foundation's chairman, while Eddy works with the Foundation on the Steam Castle.

• Robert Stephenson → Dr. Edward 'Eddy' Steam (Conflict Military Opponent) — Their competing uses of steam technology turn the exhibition into a battlefield.

  Stephenson uses the Steam Ball to enhance his company's tanks while Eddy unleashes steam-powered weapons at the exhibition.

Story Analysis

A young inventor must choose between technological wonder and destructive ambition while repairing a divided scientific family.

Plot Progression

1. The Sphere Inheritance — Lloyd and Eddy discover a revolutionary power source, but their experiment creates the Steam Ball and severely injures Eddy. Years later, Lloyd sends the device to Ray, drawing him into a dangerous pu...
2. Captured Into Wonder — Ray is captured and taken to London, where he meets Scarlett and discovers that his father is alive inside the Steam Castle. Fascinated by Eddy's vision, Ray temporarily joins the project.
3. Science Divided — Lloyd escapes and reveals the castle's hidden armory and the Foundation's plan to sell weapons. Ray must decide whether scientific progress can be separated from vanity and militarism.
4. The Floating Battlefield — The exhibition becomes a battlefield when Eddy attacks the soldiers and Stephenson militarizes the Steam Ball. Eddy activates the castle, transforming it into a floating fortress over London.
5. Reconciliation Above London — Ray reboards the fortress and witnesses the final family confrontation. Eddy realizes his mistake, helps Lloyd and Ray redirect the machine, and the castle explodes safely over the Thames.