Blood of the Vampire

A brilliant but ruthless physician who runs the prison laboratory and orchestrates dangerous blood experiments. He wields fear and charm to control inmates and staff, pursuing a perverse form of immortality through living blood. His arrogance and lack of ethics drive the central conflict.

A skilled doctor condemned for malpractice, he is recruited to assist with blood-typing research. He becomes increasingly uneasy about using unwilling inmates’ blood and wrestling with professional ethics. His commitment to science is tempered by compassion and self-doubt.

John’s fiancée who refuses to accept his fate. She goes undercover as Callistratus’s housekeeper to uncover the truth, showing determination and courage. Her loyalty to John fuels her resolve to expose the prison’s dark experiments.

An inmate whose body is exploited by the experiments due to a rare blood condition. He becomes a focal point of the heart-transfusion scheme and ultimately dies after an escape attempt, symbolizing the human cost of corrupted science.

A severely physically disabled inmate who grows to care for Madeleine and aids John’s cause. He embodies loyalty and quiet strength, and his involvement heightens the stakes of the escape and rescue.

A member of the Prison Commission who plays both sides, routing forged messages and orchestrating interference. He attempts to exploit Madeleine and deflect scrutiny, showing calculated menace.

A brutal enforcer within the prison system who enforces authority with menace and physical force, including releasing the Doberman guards to intimidate inmates.

The judge who sentences John, whose decision is shadowed by forged correspondence and manipulation. His role underscores a legal system vulnerable to political games and deceit.

A high-ranking prison guard who upholds the authority of the institution, enforcing orders and maintaining control over the inmates.

Another gatekeeper of the prison, aiding in the suppression of escapes and the enforcement of Callistratus’s rules.

A secondary guard who witnesses the events inside the prison and participates in the perilous environment.

A minor courtroom figure who appears during the trial scene; his presence helps advance the legal proceedings.

A supporting physician present in the hospital-like setting, adding to the unstable medical environment of the story.

Housekeeper to Callistratus who serves as Madeleine’s cover and ally in gathering information.

A minor female character who appears in scenes around the court and residence; plays a limited role in the broader plot.