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Librarian J (司書J) is an elder lich in the service of Titus Annaeus Secundus in the Grand Library of Ashurbanipal.


Librarian J wears a black hooded robe, a belt attached with a jewelry embedded wand, and various straps interwoven with crystals. He has a pale face that looked as if it had been embalmed. To differentiate himself from the other elder lichs in the library, he wears an armband on his left arm with his name written on it.


Contrary to his decrepit appearance and status as an elder lich, Librarian J is friendly to visitors of the Grand Library. He is very courteous and helpful in his duties as a librarian. The librarian is known to often suggest books to advent readers.


Librarian J acts as one of the several caretakers of the Grand Library of Ashurbanipal.


The Two Leaders Arc[]

Main article: The Two Leaders Arc

When Mare Bello Fiore visited the Grand Library, Librarian J greeted the Floor Guardian and guided him to Titus. He also accepted the books Mare wished to return.[1]

Abilities and Powers[]

Librarian J is an elder lich and possesses all the basic racial traits as one. He is specifically a "white palter of false wealth." He is at average only level 30 and wields a jeweled wand that is strapped to his waist. 


Titus Annaeus Secundus[]

Titus is Librarian J's superior, thus he is the Chief Librarian's subordinate.

Mare Bello Fiore[]

Mare is a frequent visitor to the Grand Library, so the elder lich is accommodating to the Floor Guardian.


  • In the Web Novel, Librarian J is a level 31 elder lich in Nazarick.
  • In the Manga Librarian J is unnamed but his appearance matches the elder lich that is mentioned in the Light Novel series.


  • (To Mare): "The Chief Librarian started crafting scrolls not too long ago, so he should be in the Crafting Room."
  • (To Mare): "Then I have a recommendation for you. It’s a book that will make you laugh non-stop. It's about murder— Ah, this way."


  1. Overlord Volume 08 Side Story 2: A Day in Nazarick


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Great Tomb of Nazarick
1st-4th Floors Residents
Shalltear Bloodfallen Kyouhukou Gargantua
Well of the Dead Adipocere Chamber Black Capsule
5th Floor Residents
Cocytus Nigredo Neuronist Painkill
Frozen Prison Snowball Earth
6th Floor Residents
Aura Bella Fiora Mare Bello Fiore Gashokukochuuou Fenn Quadracile Pinison Pol Perlia Iris Gagarpur
Gigantic Tree Amphitheater Green Hole
7th Floor Residents
Demiurge Guren Evil Lord Wrath Evil Lord Greed Evil Lord Envy Evil Lord Sloth
Blazing Temple
8th Floor
Victim Aureole Omega Rubedo
9th Floor Residents
Sebas Tian Sous-chef Head Chef Tuareninya Veyron Cixous Decrement Foire Lumière Increment Fith Foss Etoile
Spa Resort Nazarick Round Table Room Harem Room Bar Guest Room Ninja Mansion Quiz Room
10th Floor Residents
Ainz Ooal Gown Albedo Yuri Alpha Lupusregina Beta Narberal Gamma CZ2128 Delta Solution Epsilon Entoma Vasilissa Zeta Gremory Titus Annaeus Secundus Librarian J Cocceius Ulpius Aelius Fulvius Aurelius
Ashurbanipal Lemegeton Throne Room Audience Room
Pandora's Actor
Other Residents
Pestonya Shortcake Wanko Eclair Ecleir Eicler Chacmool Hamsuke Chief Blacksmith Pulcinella Grant Mondenkinto