Blonda, an overweight woman considered unattractive in appearance and voice, possesses high blood pressure. Her past reveals a youthful beauty and a marriage to Dorian Gray in Prague. Dorian made a pact with the devil for success, which led to violence within their marriage; after three years, he was pulled into a painting frame, prompting Blonda to leave. She then relocated to Japan, working as a bar hostess and developing a habit of excessive ramen consumption that contributed to her physical transformation.

Upon Dracula's arrival in Tokyo, Blonda became his first victim. This bite ignited an obsessive fixation, driving her to relentlessly pursue Dracula to force further blood-sucking encounters. Her persistent advances and disruptions to the Dracula household form a recurring comedic element, often presented as an unwelcome gag. Her role remains static across the series and official media, serving solely as a source of conflict through her single-minded pursuit of Dracula.