Franz Bonaparta is credited with initiating the eugenics experiment that resulted in the birth of the Liebert twins and is also known for authoring the storybooks used to indoctrinate the children at Rose Mansion. Among his most notable works is "The Nameless Monster," from which Johan derived both his name and his modus operandi. Other well-known titles by him include "The Big Eyed Man and the Big Mouthed Man," "The God of Peace," and "The Quiet Village." His books are rich in metaphor and symbolism, often featuring monsters as central characters. Many of his stories explore the theme that human nature has the potential for both good and evil, though his works tend to criticize humanity rather than uplift it.
After witnessing Grimmer's death, he repents for his actions and attempts to confront Johan with the intention of killing him. However, before he can carry out his plan, he is killed by Roberto. Known primarily as Franz Bonaparta, his real name was Klaus Poppe, but he has also gone by the names Emil Scherbe and Jakov Vyrobek.
