Mayhem drummer Jan Axel ` Hellhammer ' Blomberg described Dead as `` a very strange personality [ ... ] depressed , melancholic , and dark '' . Likewise , Mayhem guitarist Øystein ` Euronymous ' Aarseth once said : `` I honestly think Dead is mentally insane .
He was described by Jan Axel `` Hellhammer '' Blomberg , the drummer for Mayhem , as being `` a very strange personality ... depressed , melancholic , and dark '' and guitarist Øystein ` Euronymous ' Aarseth said `` I honestly think Dead is mentally insane .