Henadic Theologian
Legend
I know OF the show but no.
WATCH IT, it's a great show and basically in D&D terms the Librarians and their Guardian would be Warlocks (some multiclass) with The Library (which is very much a LIVING Library who picks it Librarians and the Guardian of the Librarians via invitation).
I don't know how I never made the connection between the Librarians and D&D Warlocks before.