The Black Vampire

Amalia is a glamorous nightclub singer who witnesses the killer disposing of a body through a barred basement window. She hesitates to speak to the prosecutor for fear of losing custody of her daughter, revealing a protective, pragmatic side. Her courage grows as the investigation unfolds, showing resilience under pressure and a willingness to confront danger for her child’s sake.

Gastón is the nightclub owner under suspicion of narcotics trafficking. His involvement with the club places him at the heart of the investigation, and his sudden death during a police raid removes a key suspect and raises the stakes for everyone involved.

Teodoro Ulber is a shy, overcoat-clad language teacher who leads a double life as a vampire killer. His inhibited demeanor masks a predatory psyche that exhales through stalking and murder, marked by a distinct whistle and a grim, methodical approach. He is ultimately captured and sentenced to death by hanging, marking the film’s stark end to his reign of terror.

Dr. Bernard is the government prosecutor who questions Amalia and shows personal vulnerability through his devotion to his wheelchair-bound wife. He is sexually frustrated, and his desire creates tension with Amalia, complicating the professional boundaries of the investigation. He embodies the moral ambiguities present in the pursuit of justice.

Cora is Amalia’s co-worker at the nightclub who endures Ulber’s unsettling attention. She interacts with the killer in a way that exposes the social circle surrounding Amalia and provides a human perspective on the dangers hidden within everyday life. Her steady presence contrasts with the film’s more sensational thriller elements.

The Norwegian beggar who recognizes Ulber’s whistle from Grieg’s Peer Gynt Suite and raises the alarm. His observation helps connect the killer’s pattern to a broader urban network of witnesses, illustrating how ordinary bystanders can influence the pursuit of a serial killer.

The merchant seaman arrested as the first suspect represents the early misdirections in the investigation. He is ultimately not the killer, highlighting how initial leads can mislead investigators before the truth is uncovered.

The judge presides over the case, signifying the formal machinery of law in the film’s narrative. His role anchors the story’s legal dimensions and the final judgment of Ulber.

Mrs. Bernard is the wheelchair-bound wife of Dr. Bernard, portrayed as a figure of saintly virtue. Her presence underscores the domestic stakes that drive the prosecutor’s actions and moral choices.