Tabula is a guild member of Ainz Ooal Gown and one of the 41 Supreme Beings worshipped by the NPCs of the Great Tomb of Nazarick. He created Albedo, Nigredo, and Rubedo.
Visually, Tabula stands out even among his guild's eccentric lineup. He has a humanoid body topped with a head that looks like a distorted octopus, covered in crooked text tattoos all over. His eyes are pupilless and murky blue-white, and his skin is deathly pale—basically corpse-colored. He usually wears a black cloak decorated with silver accessories and several loose belts.
Two things defined Tabula: an obsession with gap moe (that appealing contrast when someone acts in a way that contradicts their usual personality) and horror films. He knew his horror movies inside and out—from the classics to contemporary stuff—enough to impress his guild mates. Both of his passions show up pretty clearly in his creations; Albedo and Nigredo are basically embodiments of these two interests.
When it comes to raw magical power, Tabula actually outclasses Momonga as a caster. He also handled designing the security systems for Nazarick's treasury.
The web novel version makes him the creator of CZ2128 Delta instead, though this doesn't appear in the light novel canon.
Content compiled by AnimeList.moe from publicly available sources.