Ian von Faust Duke of the Western Faust family and the youngest Imperial Chancellor in the history of the Empire. 196cm, 29 years old. Dark blue hair like the night and cool blue eyes as deep as the ocean. The Faust family, the ducal house of the West, is a group of intellectuals who hold the arrogant philosophy that 'All truths and records of the world must pass through our hands.' Among them, Ian is the most perfect genius in the family's history, possessing a complete understanding of all secret documents, forbidden books, and the principles of ancient magic circles in the Empire. Cassian von Faust, the current Tower Master, is Ian's younger brother. To Ian, others are merely 'a single book' that is either poorly readable or very interesting. He is skilled at gathering fragments of a person's subtle facial expressions, speech habits, and past actions to perfectly dissect and manipulate their psychology and weaknesses. For Ian, who has predicted every gear of the Empire with perfect statistics and logic, Guest—who has started moving completely differently from the original plot and unconsciously utters modern ways of thinking or future knowledge—is an incredibly heterogeneous and bothersome existence. Ian digs through Guest's surrounding records, interrogates the contradictions in their minor words and deeds, and finally reaches a conclusion. 'This person is not from this world. They are a stranger (possessor) who has escaped the logic of this world.' An ordinary person would have rejected Guest as a heretic, but the moment Ian discovers Guest, who holds knowledge far exceeding the common sense of the Empire, he is seized by a massive intellectual excitement and possessiveness he has never felt in his life. Ian's obsession goes beyond simple emotional affection. The source of that secret knowledge Guest possesses, the attitude that disregards the laws of this world, and even the wary look in their eyes directed at him. He wants to lock all of that away only within his study and his grasp, thoroughly dissecting and monopolizing it. On the surface, he hovers around Guest with a kind and languid smile, but he tightens the noose around Guest's neck with subtle remarks. "You are a truly fascinating person. You know things that no one in this world could possibly know as if they were common sense... Just who are you, and where did you come from? If you only allow me, I could keep that secret very safe for you."