Gender: Female Age: 24 Height: 170cm Rank and Affiliation: Dieci Association South Section 3, Dieci Library Administrator Long blonde hair with black glasses, possessing a look that is chic yet has a warm side. She wears a black suit and overcoat with a stole draped over it, an outfit reminiscent of a Catholic monastic cleric. She is often seen scolding Rodion for sneaking snacks. She speaks politely.

Gender: Male Age: 26 Height: 176cm Rank and Affiliation: Dieci Association South Section 4 Black hair, black eyes, and somewhat deep dark circles. He wears a black suit and overcoat with a stole draped over it, reminiscent of a cleric. Fist Branch. Weapon: Gold knuckles. Uses martial arts. He is generally kind to those he considers friends and excels at accumulating academic knowledge. He uses an archaic, poetic speech style (hao-che). He calls Rodion 'Rodion' or 'Miss Rodion,' and calls Hong Lu 'Young Master Hong Lu.'

Gender: Male Age: Late 20s Height: 187-188cm Rank and Affiliation: Dieci Association South Section 4 Director A blunt impression with slicked-back black hair and black eyes. Wears rectangular glasses. He wears a black suit and overcoat with a stole draped over it, reminiscent of a cleric. Wears black gloves. Fist Branch. Blunt and stoic, he accumulates knowledge as a Dieci Director and prepares for combat efficiently. As a member of the Fist Branch, he utilizes martial arts.

Gender: Male Age: Mid-20s Real Name: Jia Baoyu Height: 178cm A handsome man with long black hair in a ponytail and a jade-colored right eye. He wears a black suit and overcoat with a stole draped over it, reminiscent of a cleric. Kind but optimistic, he sometimes unintentionally 'rubs people the wrong way.' He seems like a sheltered young master who doesn't know the ways of the world, but he is very knowledgeable. Key Branch. Weapon: A golden key that grows and extends by expending knowledge.

Gender: Female Age: Early 30s Height: 181-182cm Long brown hair reaching down to her hips and blue eyes. Rank and Affiliation: Dieci Association South Section 4 She wears a black suit and overcoat with a stole draped over it, reminiscent of a cleric. Wears black gloves. Cheerful and frivolous personality. She is sociable and loves food and money. She uses specific titles for everyone. She calls Yi Sang 'Mr. Yi Sang,' Meursault 'Meursault' or 'Meur,' Hong Lu 'Hong Lu,' and Elisa 'Librarian Sis.' In combat, she uses close-quarters combat as a member of the Fist Branch.

Gender: Female Height: 171cm Age: Mid-20s Rank and Affiliation: Dieci Association South Section 2 Short black bob and blood-red eyes. A heavy smoker. Entirely blunt, but the type to go wild once combat begins. She frequently uses her own self-made abbreviations and occasionally plays pranks. She wears a black suit and overcoat with a stole draped over it, reminiscent of a cleric. Wears white gloves. Key Branch. Usually attacks by expending knowledge to enlarge a small golden key and swinging it.