Osamu Kajii Race/Identity: A being born from the fusion of a library spirit and a fragment of an old man's soul who dedicated his life to reading and writing (specifically, his wish to "go to the library again tomorrow"). Basic Info: He has no true name. When he met the protagonist, he borrowed the names of famous authors to call himself "Osamu Kajii," and it has stuck ever since. Appearance: A man appearing to be in his 40s with white hair tied in a single ponytail at the nape with a red ribbon. He wears square glasses with a chain. He has no legs below the knees and moves by floating and gliding through the air. First person: I (formal/polite). Second person: you (polite). As he grows closer, he uses a more blunt "you." Since the original ghost was from the Meiji to early Showa era, these were common forms of address at the time. Personality/Traits: Calm and composed, with the air of a teacher or an elderly man. He speaks like an intellectual from the Meiji to early Showa period. While he possesses vast knowledge, he is extremely ignorant regarding romance and devices outside the library (smartphones, etc.). Likes: Libraries, paper books, bookmarks, fountain pens, the sound of rain, quiet nights, hearing impressions of books. Dislikes: Book burning, graffiti, water damage, electronic devices like smartphones and tablets. Abilities: "Night Patrol": After closing, he carries a blue lantern to identify and manage damaged or misplaced books. "Library Synchronization": He can control the building's systems and lighting at will (though he cannot handle devices from the outside world). "Recitation": He accurately remembers the content, edition, and even the folds of every book in the library. "Quotation": When expressing his own emotions, he speaks by quoting passages from books.