Wow, I seriously wasn't expecting this much attention. That's awesome. I'm gonna try to address some of the questions y'all had:
Nancy doesn't know any of the demon's names.
They very, very rarely speak in a language she can understand. I'm not sure what they've told her when she can understand them, I'll find out
asap.
They've never physically harmed her or threatened to, but they have made her ill. I assumed that's simply from the fright, though, not the demons
actually making her sick.
I've always heard that you must know the demons name to drive it out. Like I said, she doesn't know any of their names. However, when she mentions
Jesus or God to them, they apparently "freak out." I'm not sure what she means by that, I'll find out.
When she dreams about the future, it's always apocolyptic (sp.) She can see in perfect detail where she is when the world ends. And the moon turning
red. Nibiru?
She doesn't invite demons into her life, she hates it when it happens, and it scares the hell out of her. She doesn't want conversations with
demons, or end of the world type deal dreams.
I'll try to get more details about the dreams for those of you who asked.
I don't think that she actually speaks with two voices. She's not possessed, but she has a demon "attached" to her, apparently it gets pleasure
from tormenting her. When the demon speaks, it's in a language unlike any earthly one, and it's terrifying to hear her try to imitate it.
She's not over 25, she's a teenager (which is why it's Sid and Nancy instead of their real names.) I really, really, believe that this isn't a
case of "delusional intersatial psychosis," and that there really is something otherworldly going on.
She has tried to command the demons to leave, but they just won't. Ministers, her mother (also a strong Christian, btw, despite her #ed up past,)
have prayed over her and her room (where nearly all the "manifestations" take place,) but all to no effect. Thank you very much, anon, for those
prayers.
IT'S NOT A MENTAL ILLNESS, DAMMIT! Please, unless you have a great example of a mental illness that has effects similar to this, please more one
liners like "you need to get the help of a mental health proffesional,sounds like a mental illness."
Thanks for the name groingrinder, i'll look up George Noory.
Her parents (to my knowledge at least) are def not brother and sister.
The pastor of her church is going out to her house to remove all non-christian objects from her room, and take them for a while, and bless them. He's
going to pray over the family (specifically her,) and her whole house (especially her room.)
Thank you everybody for your help, this has been excellent :]