Only remaining founding member of Swedish band Therion. He plays guitar, keyboards, and did some vocals on Therion's albums, mostly the early releases up to 1996. As a composer, he writes almost all of Therion's songs, however he doesn't write the lyrics.
Christofer is a member of Dragon Rouge circle since 1991, which heavily inspired Therion's lyrical themes.
Among his side projects and solo projects are mostly Swedish Death Metal acts, like Carbonized, Liers in Wait, Procreation and Demonoid. He also has a vocal appearance on the album "Underground" (1994) by Swiss thrashers Messiah.