you had occasionally groups which had a manipulator/sound designer or someone in a similar position in promo pictures and treated as complete Band member, and I just really REALLY badly need some kind of reference how they actually will look in MVs or Live performances, because everytime they had such a member they left the group before the group got one Live recording or Music Video release.
if you tell about your experience about such a guy in a live performance I would also be eager to hear about that.
one example of one of those mysterious musicians
the topic title is for comedic reasons a hyperbel, I am actually really curious and intriguided to see those musicians perform.