What should a fan of this Franchise be reffered to as?

[Guyra]

Penumbra fans. Mixing it up like that, placing "fan" in front of "umbra", and removing the "pen" in "penumbra"... It kind of gives it a whole different meaning. I mean, you've got the umbra, penumbra, and antumbra... And then you place "fan" in front of "umbra"? "Fanshadow"?

"Yay, I'm the shadow cast from a fan!" - Doesn't quite work for me.