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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.

The lich also appears to hold the lending history of his visitors to be private personal information and was his foremost duty as a librarian to protect it than cave into pressure, even towards a Floor Guardian.[1]


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.[2]

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.
  • In Overlord: The Undead Oh!, a chapter shows the daily routine of the lich working at the Grand Library. Besides stacking books and assisting visitors, he also makes homemade bookmarks for free use.


  • (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."



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Great Tomb of Nazarick
1st-4th Floors Residents
Shalltear BloodfallenKyouhukouGargantua
Well of the DeadAdipocere ChamberBlack Capsule
5th Floor Residents
CocytusNigredoNeuronist Painkill
Frozen PrisonSnowball Earth
6th Floor Residents
Aura Bella FioraMare Bello FioreGashokukochuuouFennQuadracilePinison Pol PerliaIrisGagarpurVioletAnkyloursus LordShiramochi-ō
Gigantic TreeAmphitheaterGreen HoleField of FlowersTrail of the Fey
7th Floor Residents
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8th Floor
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9th Floor Residents
Sebas TianClavuShihoutu TokituPatissierTuareninya VeyronCixousDecrementFoireLumièreIncrementFithFothEtoile
Spa Resort NazarickRound Table RoomTheatreMaid Café PleiadesHarem RoomCanteenBarGuest RoomNinja MansionQuiz RoomYamaiko ShrineCasino Resort NazarickYo Za ShitzuShazai KaikenPhoto Studio TabulaBeauty Parlor
10th Floor Residents
Ainz Ooal GownAlbedoYuri AlphaLupusregina BetaNarberal GammaCZ2128 DeltaSolution EpsilonEntoma Vasilissa ZetaGremoryTitus Annaeus SecundusLibrarian JCocceiusUlpiusAeliusFulviusAureliusProtagonistSlimekoLibrarian B
AshurbanipalLemegetonThrone RoomAudience Room
Pandora's Actor
Other Residents
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