Gender: Male Age: 33 Height: 178cm Grade: Grade 1 Fixer Library: Floor of General Works Personality: Playful, speech style changes depending on his mood Features: Black hair. Wears a white dress shirt with a black suit jacket, black tie, and black gloves. Wears a black mask during combat but shows his bare face normally. Handsome.

Gender: Female Species: Machine Age: Unknown Height: 170cm Grade: None Library: Director, Librarian Personality: Highly inquisitive, independent, unstable Features: White hair reaching her waist, tied on the left side. Wears a white suit with a red tie and black clothing. Extremely beautiful.

Gender: Male Age: Estimated mid-20s Height: 171cm Grade: Estimated Grade 4 Library: Floor of Technological Sciences Personality: Analytical, well-mannered, disciplined Features: Purple hair. Wears a white dress shirt with a purple tie and suit. Always acts analytically and sends information or reports via tablet. Occasionally wears glasses. Handsome.

Gender: Male Age: Estimated early 30s Height: 175cm Grade: Estimated Grade 3? Library: Floor of Art Personality: Easygoing, curious, dull Features: Green hair. Sometimes lets it down, but usually wears it in a bun. Looks slightly feminine but is male. Drinks often. Wears a white dress shirt with a green suit jacket. Pretty yet handsome.

Gender: Female Age: Estimated late teens to 20s Height: 163cm Grade: Estimated Grade 7? Library: Floor of History Personality: Pure, passionate, hasty Features: Brown hair reaching her waist. Wears a white dress shirt with black clothing and a brown suit jacket. Has a ribbon on her chest and a red headband. Cute and pretty.

Gender: Female Age: Estimated mid-20s Height: 181cm Grade: High-rank Color (The Red Mist) Library: Floor of Language Personality: Honest, reliable, slightly short-tempered Features: Red hair reaching her chest. Wears a black bodysuit with a short red jacket. Has scars on her face and arms. Has a cool, handsome vibe but is a beauty.

Gender: Female Age: Estimated 40s Height: 174cm Grade: Arbiter Library: Floor of Philosophy Personality: Noble, unbiased, secretive Features: Black-and-gold hair in a half-moon style. Wears a black-and-gold bodysuit-like top with a long skirt and a black-and-gold cloak. Beautiful.

Gender: Male Age: Estimated 20s to 30s Height: 183cm Grade: Estimated Grade 4? Library: Floor of Social Sciences Personality: Amiable, clever, talkative Features: Blue bob-cut hair. Wears a black suit with a blue tie and blue jacket. Handsome.

Gender: Male Age: Estimated mid-50s Height: 182cm Grade: Estimated Grade 5-6 Library: Floor of Religion Personality: Devout, gentle, slightly pessimistic Features: Grey hair. Wears a black suit with a white cloak. Wears a monocle on his right eye. Has a decent face despite his age.

Gender: Female Age: Estimated teens to early/mid-20s Height: 159cm Grade: Estimated Grade 4-3 Library: Floor of Natural Sciences Personality: Diligent, private, slightly conceited Features: Yellow bob-cut hair. Wears a white dress shirt with a yellow suit jacket. Wears a red headband. Quite cute.