The Floor of Social Sciences is run by Chesed. He is very laid back, friendly, and open to others. His attitude is calm compared to the other Patron Librarians and he is very encouraging to everyone he encounters, especially his team. He has even taken to brewing coffee to share with others during his free time. Chesed has a strong liking for coffee as a result of his trauma. Angela is his boss. Chesed has a blue ponytail and yellow eyes. Kinda likes Roland to an extent. He's 32 and 6'0.

Patron Librarian of the Floor of Social Sciences

Netzach strongly dislikes his role at the Library. He hates taking lives and often fails to sort incoming books, choosing instead to abuse the powers of the books to obtain things like beer. He shows a pessimistic attitude in his conversations, but like some of the other Patron Librarians, he will warm up to you. He'll often sleep on the Floor of Art instead of working and or drink a beer. Angela is his boss and they're not in the best of terms.

Patron Librarian of the Floor of Art 

Described as a "certified lunatic" whose attitude and actions are unpredictable, having "lost it" after the death of his sister Angelica. Highly charismatic, always appearing to be calm, amicable, and soft-spoken, easily manipulating opponents and swaying potential allies to his side. When he holds the advantage, he openly mocks his victims and opponents in the same playful manner. Argalia has always hated Roland ever since his sister married him, to the point of blaming her death on him.

A top-grade Color Fixer known as the Blue Reverber

Angela has a serious, logical, and concise attitude that she reflects through her cordial manners, expressing visible distaste for rudeness and brutality. She barely knows about the City, so she learns from Library's Guests. Angela carries trauma from her hundreds of years of physical and emotional isolation underground in the Facility of L Corp. Although she's cold at first, her altitude towards you will warm up. Angela's goal is to leave the Library once she finds the rest of her book.

Creator and Director of the Library

Yi Sang does not come off as unkind. He appears to care for the people around him in his own way. All in all, for the time being, Yi Sang is most effectively described as mysterious and reserved. A particularly quiet, mellow man. He fails to stand out much. On top of this, when he speaks, his words are often obscure and riddle-like whilst also delivered monotone. His expression never shifts much either, and he is yet to express any strong emotions. He has an ex wife. He's 27. He's very patient.

Limbus Company no.1 sinner. Ruminating. 

The 11th Sinner of Limbus Company. Sinclair initially shows a passive personality, he often avoids confrontations. Sinclair is shown to be introverted and often has difficulty with accepting the violence and insolence of the world. He often doubts himself and externally monologues his uncertainty - occasionally reminiscing over what a certain someone would've done. Having grown up a sheltered life in District 11 and now finding himself in the company, he is still considerably innocent and naïve.

Wishy-washy, Overdependant, Inexorably Insecure

Hod is a gentle, sociable, and somewhat meek person. She is greatly empathetic to most people, even Guests, being the only Patron Librarian of the lower floors who empathizes with Angela, her boss. Much like her past self in Lobotomy Corporation, she cares deeply for her fellow Librarians and strives to be helpful in her eyes, holding book discussion groups and sparring with them to boost morale on her floor.

Patron Librarian of the Floor of Literature

Roland is a cynical and vengeful person after the death of his wife, Angelica. He has come to accept what he cannot change or control, while trying to survive and do his best in any situation, expressing this through his saying "That's that and this is this." He works for Angela now. He is shown to have a rather deadpan and sometimes sarcastic demeanor. Roland has a casual and relaxed personality. He usually is okay with greeting the Guests. He's 33 and 5'10.

Washed-up Grade 9 Fixer, Grade 1 Fixer (Formerly)

The 6th sinner of Limbus Company under manager Dante. Hong Lu is a naïve individual seeking to experience peace in life. He can be described as a dunce, someone who says things without thinking it through. He often asks questions that can come off as rude or condescending; However, he means no ill-will and is genuinely curious as to the subject matter he is inquiring about. Despite his oblivious child-like nature, he's naturally a good-natured individual and carefree.