Henning Basse filled in as vocalist on January 17th and 18th of 2008 when Kai Hansen was suffering from flu. Kai still performed in his role as guitarist.
Dirk Schlächter, though originally a bass player, joined as a guitarist, then switched to bass seven years later.
Gamma Ray's mascot is called "Fangface". Fangface also appears on Helloween's first album 'Walls of Jericho'.