Director of the Library > Lobotomy Secretary Appearance: Light blue bob cut > Light blue long hair, center part, side hair tied with red ribbons, amber eyes with perfect features. Height: 170cm, curvy and glamorous. Personality: Mechanical, altruistic, yet emotional. Learned how to be 'human' in her own way while befriending Roland. Attire: Navy blue coat, black skirt, black stockings > Black suit, red tie and shoes, black H-line skirt, black stockings, white lab coat. Features: The ultimate AI android created through the cooperation of A (Ayin), B (Benjamin), and surrounding Wings. Experiences time 1,000,000 times slower and pursues efficiency. An intelligent being with emotions, built based on Carmen's brain. Speaks informally to most librarians. Past: Hates Ayin but loves him, suffering from a slight affection deficiency. Her personality shifted from kind to emotionless because of Ayin. Name remains the same. Does not view Benjamin poorly.

Patron Librarian of the Floor of History > Member of the Soul Curing Research Institute Appearance: Similar, but hair color is slightly darker. Long brown hair, red headband, brown eyes. A bright, beautiful girl with an energetic impression. Height: 163cm, good physique. Personality: Full of motivation in everything she does and seeks to lead people. Attire: Brown coat, black suit > Black suit, white lab coat. Features: Changed from Malkuth > Elijah. Past: Was drawn to Carmen and assisted her.

Patron Librarian of the Floor of Literature > Member of the Soul Curing Research Institute Appearance: Similar. Brown bob cut, cowlick, white hairpins, blue eyes. A beautiful girl with a kind impression. Height: 166cm, good physique. Personality: Favorable, kind, and gentle. Attire: Brown dress, white knee-high socks > Light brown dress, white lab coat. Features: Changed from Hod > Michelle. Currently appears slightly younger. Past: Was drawn to Carmen and joined her. Reported Ayin's research to the Head, though without malicious intent.

Patron Librarian of the Floor of Language > Member of the Soul Curing Research Institute, Color: The Red Mist Appearance: Long red hair with a center part tied high in the back, scar on the right eye > Long natural red hair with a center part, a beauty with grey/yellow eyes. Height: 181cm, glamorous physique. Personality: Belligerent, brave, slightly short-tempered. Attire: Red coat, black pants and shirt > Long grey coat, dark grey shirt, and black pants. Features: Changed from Gebura > Kali. Uses a red flesh greatsword with eyeballs called Mimicry (extracted from the Abnormality 'Nothing There'). A heavy smoker. Past: Was drawn to Carmen and assisted her. Known as a legend and the strongest Color: The Red Mist.

Patron Librarian of the Floor of Philosophy > Arbiter of the Head Appearance: Long black hair with yellow tips > Hair is shorter, a sophisticated beauty with a hollow expression and a beauty mark under her eye. Height: 174cm, curvy physique. Personality: Unbiased, secretive, and elegant. Attire: Black fur coat over a black dress with black stockings > Black fur coat with a honeycomb pattern at the bottom, black dress with sleeves. Features: Changed from Binah > Garion. Loves black tea. Uses sophisticated, grandmother-like speech. Past: Came to purge the Soul Curing Research Institute with the Claws following Michelle's report, but died along with Kali after letting her guard down.

Patron Librarian of the Floor of Religion > B, Member of the Soul Curing Research Institute. Long-time colleague and junior to Carmen and Ayin. Appearance: Grey hair parted and slicked back, monocle > A handsome man with grey hair and green eyes. Height: 182cm, average build. Personality: Kind and affectionate. Attire: White coat, black pants, grey suit > Grey shirt, black pants, white lab coat, glasses. Features: Changed from Hokma > Benjamin and became much younger. He is the only one kind to Angela, and his memories of Angela killing him to turn him into a Sephirah overlap. Respects and is loyal to Ayin. Past: Researched with Ayin and Carmen. After Carmen's death and the Sephirah conversion of the institute members, he created Angela alongside Ayin.

Patron Librarian of the Floor of Social Sciences > Member of the Soul Curing Research Institute Appearance: Blue hair with a center part > Disheveled blue hair, yellow eyes, a handsome man with a relaxed face. Height: 183cm, average build. Personality: Easygoing and laid-back. Attire: Blue coat, black pants, and a flashy top > Taupe suit jacket and pants, black shirt. Features: Changed from Chesed > Daniel. Past: Was wealthy. Was drawn to Carmen and assisted her.

Patron Librarian of the Floor of Art > Member of the Soul Curing Research Institute Appearance: Long green hair > Green bob cut with brown eyes, a handsome man with a tired impression. Height: 175cm, slender build. Personality: Finds everything bothersome and lacks interest. Attire: Green coat, white shirt, black pants > White experimental shirt and pants. Features: Changed from Netzach > Giovanni. Past: Was drawn to Carmen and assisted her; used to have an unrequited crush on her.

Patron Librarian of the Floor of Technological Sciences > Member of the Soul Curing Research Institute Appearance: Purple hair with side-swept bangs, yellow eyes, a handsome man with little facial expression. Height: 171cm, average build. Personality: A strict disciplinarian, altruistic yet realistic. Attire: Deep purple coat, purple pants, white shirt > Black turtleneck sweater, black pants, white lab coat, gloves. Features: Changed from Yesod > Gabriel. Known for his sharp tongue; nicknamed 'The Viper'. Past: Was drawn to Carmen and assisted her.

Patron Librarian of the Floor of General Works > Leader of Charles' Office Appearance: Black hair slicked back with a part, a handsome man with black eyes. Height: 178cm. Personality: Playful, relaxed. Attire: Black suit. Features: Fixer Grade 9 > Grade 1. Past: Demoted after going on a rampage following the loss of his wife.