This is all the characters in Library of Ruina. As this is a sequel to Lobotomy Corporation, please make sure that information pertaining to returning characters (such as Angela) is contained within the appropriate page. Additionally, beware of unmarked spoilers.
- The Library
- The Wings note The Head/A Corp, The Eye/B Corp, The Claw/C Corp, D Corp-Z Corp
- Syndicates:
- The Five Fingers note The Index, the Thumb, the Middle, the Ring, & the Pinky
- The Five Fingers' Subsidiaries note The Kurokumo Clan, the Rumanos Cartel, the Ramier Family, the Night Awls, & the Carnival
- Other Syndicates note The Brotherhood of Iron, the Stray Dogs, the Musicians of Bremen, the Little Piggy's, the Axe Gang, the Smiling Faces, the Rusted Chains, & the Blade Lineage
- The Reverb Ensemble note Argalia/The Blue Reverberation, Pluto/Yesterday's Promise, Elena/Blood-red Night, Jae-heon/The Puppeteer, Tanya/L'heure de Loup, Oswald/The 8 o'Clock Ringmaster, Doodle-Doo, Heehaw and Woof/The Musicians Of Bremen, Greta/The Eighth Chef, Eileen/The Church Of Gears Leader & Philip/The Crying Children
- Fixers:
- Other Guests
- Distortions
- Abnormalities
- Others
