Xy and Vorph are brothers.
Up to Worship Him, Vorph was known as Vorphalack, and Xy as Xytraguptor. Later on, Vorphalack shortened his name to Vorph, while Xytraguptor became Xytras, and then Xy
The band began as an old-school black metal act and slowly changed into electronic/industrial. Xytras was the drummer on all albums until Passage, at which point he moved over to keyboards and drum programming.