Wiki information Gylve:

Gylve Nagell
Black metal Artist, Person, Musician, Musical Artist, Lyricist, Person or entity appearing in film, Composer

Gylve Fenris Nagell, better known as Fenriz, is a Norwegian musician who is best known as being one half of the metal duo Darkthrone. Although primarily a drummer, he has also performed bass, guitar and vocals for Darkthrone and a number of other...

Himself - Darkthrone (as Gylve 'Fenris' Nagell)
Film character, Fictional Character