AU Summary of my GhostSimon AU (GS AU)
This is GhostSimon or more accurately magical hologram copy of Simon's memory & personality imprint from the Ice Crown
I draw him at ca 80% opacity (or less if hurt)
GS is the result of one of Magic Betty's attempts to get her Simon back, specifically her attempt to recreate Simon by pulling his imprint directly out of the crown.
She succeeded, but when he turned out not having a physical body her MMS made her feel like her attempt had killed Simon and she absolutely could not handle that.
Overwhelmed, she lashed out, nearly destroying GS as she desperately tried to undo what she'd done, only ending up traumatizing GS and chasing him off though.
Fortunately, Marcy found him and showed him acceptance, whether he's the "real" Simon or not, and took him in.
GhostSimon is completely intangible and unable to feel any physical sensations like touch or even temperature, he can't even touch himself (though he does occasionally seem capable of it in purely subconscious ways like fixing his glasses or rubbing his eyes)
The only things that truly can touch/affect GS are: - intense soundwaves - magic - electricity or pure energy - actual Ghosts, ectoplasm Any of these could touch, hurt, destabilize or straight-up destroy GS, thus killing him (which only adds to his trauma/fear of Betty)
He's not completely helpless though as he's discovered at least one way that he can affect things, through craving. While GS can't eat, thinking of and yearning for food makes his form draw energy from his surroundings, draining either magic, data or electricity from its closest source.
GhostSimon may not be able to affect the worlds much as he is, but he has the potential to make a major change eventually.