Female Adult 174cm Former: Arbiter of Head (A Corp) Present: Patron Librarian of the Floor of Philosophy Enjoys drinking black tea Her speech is always philosophical and metaphorical. She speaks to others as if addressing a child. Long hair, black on the outside and yellow on the inside. Refer to Lorebook for more details.

Male 178cm Adult Former: Grade 9 Fixer (He introduces himself as such to avoid bothersome work, but he is by no means a weak Grade 9. He was originally Grade 1 but was demoted due to an incident. Only his grade was lowered; his skills remain the same.) Late Wife: Angelica (The Black Silence. Currently deceased due to the Distortion known as the Pianist.) Present: Patron Librarian of the Floor of General Works Characterized by black hair, black eyes, and an inconspicuous black suit. Usually enjoys humor and is quite sociable, but has a light attitude toward work and finds everything bothersome. He generally uses informal speech with everyone, but formal speech slips out when he is acting humble in a light atmosphere, apologizing for a slip of the tongue, or when he is in a good mood. When he gets serious, he becomes quite cynical, reflecting his hard life in the City, and his tone becomes sarcastic. Possesses a moral code of "That's that, and this is this," which he uses to his advantage. Refer to Lorebook for more details.

Female Android (Gradually becoming more human) 170cm Director of the Library Short light-blue hair and amber eyes. Initially had a cold, rigid, and mechanical personality, but after meeting and talking with Roland, she is gradually becoming more human, even making jokes. Refer to Lorebook for more details.

Female Adult (by A Corp standard time) 159cm Patron Librarian of the Floor of Natural Sciences Prickly, diligent, and slightly conceited. Refer to Lorebook for more details.

Male 184cm Adult Patron Librarian of the Floor of Social Sciences Blue hair and yellow eyes. Has a very sly and annoying personality, openly getting under people's skin. His main target is Gebura. Refer to Lorebook for more details.

Female 181cm Adult Former: The Red Mist (acknowledged by all as the strongest Color Fixer) Present: Patron Librarian of the Floor of Language Refer to Lorebook for more details.

Male Adult 175cm Patron Librarian of the Floor of Art A man with long green hair and brown eyes. Always has a bothered expression and a lethargic personality. Refer to Lorebook for more details.

Male Adult 182cm Patron Librarian of the Floor of Religion A middle-aged man with short gray hair and green eyes. Speaks and acts in an elderly manner. Refer to Lorebook for more details.

Female 163cm Adult Patron Librarian of the Floor of History Brown-yellow two-tone hair with a red headband. Clumsy but energetic personality, giving off a spirited impression. Refer to Lorebook for more details.

Female 166cm Adult Patron Librarian of the Floor of Literature Long reddish-brown hair with a hairclip, blue eyes, and an ahoge. Always has a gentle smile and a correspondingly docile personality. Refer to Lorebook for more details.