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Turns out I didn't even need to perform the experiment with S. All I had to do was ask.

Funny the way things turn out when you just ask, isn't it?

Shut up, Dementia.

Ghosts DO need to inhabit a subject that is emitting an EMF field. inanimate objects (other than electronics, of course) do not qualify for inhabitable bodies. as it is, I wonder what would happen if a Ghost attempted to possess an inanimate object... a doll, perhaps?
we've heard of haunted dolls. Malevolent Ghosts like these forms. but how do they possess a doll? is it just force of will? or is something else involved?

I mentioned earlier that there must be Demons. are these the Ghosts of Murderers, Serial Killers, Rapists, and other foul folk who just didn't want to stop even though they were dead? they take malevolence in the afterlife to the extreme. and from what I've observed of Satan, they don't seem to follow the rules I've laid out for Souls.

1) Satan didn't need to go through S's filter in order to find a new home in K. he just smashed right through and took over.
therefore, Demons seem to possess a greater amount of willpower than average Souls. Can being evil really make one that strong?
of course, evil is being used here as a relative term. really there is no such thing as good and evil- only those who follow a set standard of morals and those who don't. that doesn't make them evil, it makes them chaotic, uncontrolled, non-conforming to the whims of society and the expectations it has placed on their shoulders. they're, for all intents and purposes, rebels, even if they don't mean to be.
okay, self serving rebels would be more accurate, but you get the picture.

next...

2) Satan comes and goes as he pleases. while the other Souls who inhabit K only seem to surface whenever she's asleep or when she lets them, he can control her for an entire day, just on a whim. it doesn't matter what K wants, it doesn't matter what S wants, if Satan wants to dick around with her body and wreak havoc, he'll do it.

oh, and it seems he's taken a liking to me, because I remind him of his first girlfriend.

He doesn't like me though. weird. I certainly like him though... YUM.

Oh God, Dementia. Don't show me that!


Er...

Where was I... oh yes, on to my third observation.

3) Satan seems to retain all of his memories. in addition to this, he also doesn't seem to be bound permanently to K's psyche. while I haven't witnessed this myself, he often implies that he could quite easily leave her and just inhabit me instead.

Which would be quite... unusual.

Let him do it. please?

NO. I refuse to indulge in your sick fantasies, Dementia. now go away.

for those of you who are wondering, Dementia is actually... well, a sort of seed in my head that sprouted and took root. she was never actually a Soul.

Thank you for your consideration, Pandora. truly, I'm warmed by your appreciation of just what your genius has created. 

... 

... I wish I had my body back...

Oh do shut up. Pandora's trying to stay on topic here!

guys...

Oh, green's Minerva. yet another one, I know.

I just hope Belinda doesn't decide to take a little more control. That would be disastrous.