Question: What did Nocturno Culto's bandmate play primarily? 
Sentence (from "Nocturno Culto"): Ted Skjellum (born 4 March 1972), also known by the stage names Nocturno Culto, Nocturno or Kveldulv, is a Norwegian musician best known as the vocalist, lead guitarist, and partial bassist (shared with Fenriz) of the influential black metal band Darkthrone.
Relevant evidence: Yes