Lady Frankenstein

An ambitious, calculating scientist who uses the castle as his laboratory, pursuing reanimation through animal transplants. He leads with authority but is eventually challenged by the consequences of his experiments. His drive for scientific prestige sets the story in motion and seals his fate as chaos unfolds.

Intelligent and ruthless, she embraces her father’s work and pushes the project forward. She uses seduction and manipulation to influence Marshall and advance the brain-transplant scheme. Her allegiance lies with power and personal advancement, not family or morality.

Brilliant yet morally compromised, he partners with Frankenstein and hopes to control the experiment’s outcome. He plots to expand his influence through the brain transplant, balancing scientific brilliance with selfish aims. His romantic tension with Tania adds another layer of danger to the scheme.

A young servant who becomes the host for Marshall’s brain, gaining extraordinary strength but losing his autonomy. His transformation creates a new, dangerous presence while exposing the vulnerability of bodies as vessels. He embodies the conflict between inherited servitude and awakened power.

A reanimated giant with a scarred head that terrorizes the countryside. It acts on primal impulse, triggering fear and violent conflict. Its rampage drives the villagers’ revolt and tests the limits of the scientists’ control.

A lawman focused on stopping grave robbing and exposing the truth behind the monster. He embodies order against chaos and becomes a key obstacle to the scientists’ plans. Harris’s skepticism foreshadows the confrontation that follows the castle’s downfall.

A deformed, loyal servant in the castle who provides background support to the scientists. Though minor, the character’s presence highlights the social margins of this world and the costs of the experiment.

Thomas Stack’s sister, who appears at a climactic moment near the end. Her involvement underscores family bonds amid the chaos and upheaval surrounding the castle’s downfall.