Monami's last name is given as "Arukado", which is the Japanese spelling of "Alucard", or Dracula spelled backwards.
Keiko doesn't become Frankenstein Girl until 57 minutes into the film.
In the Manga the film is based on, Vampire Girl and Frankenstein Girl never meet.
The majority of the final duel on Tokyo Tower was shot on separate occasions, with the title girls sharing very few actual shooting dates together.
The film contains 320 separate CG effects.