The notebook likely belongs to Leonard Wolf and features doodles of him holding a dagger in both hands, a winged sun in the sky and dead people covered in blood all around him. It is also possible the notebook belongs to Claudia Wolf, perhaps written as a child. However, the writer describes themselves as a "protector of the seal", and Leonard was the one who possessed it, while Claudia believed it to be "a piece of junk" and thought her father was foolish for keeping it, thus the notebook was most likely written by Leonard. The author's sex and gender is unknown, but Heather assumes the author is male.