Lingering Dark is the cultist leader of the branch of the Fangs of Noph in Madrioc. He appears knowledgeable and loyal to his blasphemer god, Noph, but has slightly childish motivations, treating his cult as more of an after-work hangout. He apparently works a day job. His real name is unknown.
The Peas met Lingering Dark in the sewers under the Curtain in Madrioc where they talked briefly about Noph, and negotiated the release of Ketrup.