I was also designated the responsibility of writing a series of handwritten messages and illustrations in 20+ journals, which represented the female antagonist. As it was a silent film, a great deal of dialogue was represented in the journals. The female antagonist, Lilith, is an ancient demon who uses the book as a tool to manipulate men and take their souls.
I implemented a number of changes to her dialogue, which was originally written by the director, Michael Doyle. The changes I suggested would represent Lilith in a more mature and feminine manner, which I felt was necessary for the sake of better representation and to create a more convincing tone. Additionally, there are a number of illustrations, some of which depict artistic nudity. Michael and I had a debate about how this would be represented - particularly the use of body hair. I felt body hair was a necessary component of this - to emphasize the adult womanly nature of the character.
This contribution, despite not actually being on screen or on set during recording, resulted in my role being a huge key component of the film. I have been part of the Q&A panel on a few of the screenings I've seen, discussing this experience with audience members and answering their questions.