The Narrator is a resourceful and inquisitive sixteen-year-old girl who spends much of her time reading in her father's study. She travels extensively across Europe due to her father's diplomatic work, developing a deep appreciation for history and architecture. Uncovering her father's secret past sparks her determination to chase down a centuries-old legend, demonstrating a precocious scholarly instinct and a stubborn refusal to be left behind.

Paul is a respected historian and peace-building ambassador who carries the heavy burden of a dark past. In his youth, he was a dedicated graduate student whose academic trajectory shifted violently when his mentor disappeared. He is intensely protective of his daughter and maintains a neat, cautious lifestyle, though his recounting of the 1950s reveals a deep-seated anxiety regarding the supernatural.

Helen is a brilliant, fiercely independent Romanian anthropologist raised in Hungary by her mother and aunt. She projects a harsh, defensive exterior and approaches her historical research with intense dedication and personal motivation. Harboring deep resentment toward the father she never knew, she reluctantly allies with Paul to investigate the dangerous myth surrounding her family's past.

Dr. Rossi is an eminent English historian whose reputation for solid, rational scholarship masks a terrifying personal inquiry. His scholarly curiosity drives him to investigate the reality of the Dracula legend across Eastern Europe, leading to his sudden and mysterious disappearance in the 1950s. He approaches his research with a mix of academic rigor and mounting dread.

Dracula is an immortal 15th-century ruler who has cultivated an expansive, horrifying library of war and torture throughout the centuries. Possessing immense wealth and a terrifying intellect, he operates not as a mindless monster but as a sophisticated scholar with a sinister agenda. He leaves cryptic blank books bearing a dragon crest to lure persistent historians into his orbit.

Dr. Bora is a Turkish scholar of Shakespeare with an extensive, secretive knowledge of vampire mythology. He presents himself as a cultured, hospitable academic, fluent in multiple languages and deeply versed in the history of the Ottoman Empire. His possession of ancient anti-vampire talismans hints at a deeper, protective mission within his family lineage.

Stephen is an earnest university student studying at Oxford under the guidance of Master James. Tasked with chaperoning the Narrator, he initially views his duties as a mild inconvenience but soon finds himself drawn into her chaotic and dangerous search. He provides logistical support and a grounding presence amid the escalating supernatural threats.

Master James is an English lecturer with a profound interest in the historical reality of vampire legends. His academic pursuits carry a heavy personal weight following a tragic accident that incapacitated his fiancée. He offers crucial historical insights regarding 15th-century burial practices and outbreaks of plague.

Aunt Éva is a highly intelligent woman with valuable connections within the Hungarian communist government. Having moved from Romania to Hungary in her youth, she provides her niece Helen with an excellent education and a stable upbringing. She demonstrates a fierce streak of independence and an astute understanding of political maneuvering.

Helen's Mother is a kind, resilient woman who grew up in a rural Romanian village before fleeing to Hungary. She carries a physical mark of her ancestral heritage and holds critical pieces of the past, including old letters that shed light on Rossi's disappearance. She maintains a deep, complicated connection to the historian who abruptly left her life decades earlier.

József is a handsome, arrogant Hungarian professor who secretly works for the state police. He takes an aggressive interest in Paul's movements and research, creating political and personal friction during the scholars' time in Budapest.

Mr. Erozan is a diligent archivist responsible for guarding a locked box of disturbing historical documents. His proximity to the ancient papers places him in direct danger from the shadowy figures stalking the archive's visitors.

Selim is an expert Turkish historian and bookseller with a deep understanding of Istanbul's past. He assists Dr. Bora in deciphering 15th-century records concerning plagues and monastic travels.

Ranov is a state-sponsored guide who strictly monitors foreign visitors for political breaches. He presents a constant, icy surveillance over the historians, forcing them to conduct their research in secrecy.

Stoichev is a renowned local historian who guards significant manuscripts detailing medieval monastic travels. Having experienced his own terrifying brush with the Dracula legend, he proceeds with extreme caution when sharing information.

Irina is Stoichev's niece and caretaker. She skillfully distracts government minders, allowing her uncle to discuss sensitive historical matters in private.

Georgescu is an experienced archaeologist who assists Rossi in exploring ruined castles and excavated tombs in Romania. He shares local folklore and maintains a nervous vigilance regarding both supernatural rumors and fascist political movements in the region.

Hedges is an Oxford academic and a close friend to Dr. Rossi. His proximity to Rossi's dangerous research into the ancient dragon book places him in the crosshairs of a deadly warning.