(A/N): Well, I was inspired to write this from a PM conversation with Jones Tereka Seasight. Surprisingly, our PMs to each other have gotten longer rather than shorter XD
Anyway... just so that you will understand this a bit better: the 'psychic' that you meet... well, it just needs a 'host body' to survive. And it's got a few special powers that drove Bobo mad. See the ending A/N for more on this. And I have more 'canon' for the it, if you want it.
Just... let me guide you through this, okay?
PS: Check out the companion piece to this, written by Jonesy from up there, called Reasoning.
WITCHDOCTOR
Bobinsky had never been nearly as insane as he appeared now.
It was the house - his whole move here - that drove him to trash his house and believe in things that didn't exist, like circuses made of mice performers. More accurately, however, it was a small part of his mind that drove him to do so.
That small part of his mind - the Witchdoctor, it called itself - sensed an evil presence in the house, marked by a century or two of mourning and miser and anger and sadistic happiness.
When the young girl, Coraline - although, in his confusion, he called her Caroline - had come up to Bobinsky's flat, the Witchdoctor sensed something... different about her than the other neighbors of the man.
On the surface, she was composed of anger and confusion.
Below that, tasting like it had only been refreshed a few hours ago, was happiness and suspicion.
Barely there, overpowered even by the happiness and suspicion, was another, more sinister presence, the same kind of presence it could barely taste that was lurking in the house...
Only it was much stronger on the child than it was anywhere else. It was the misery and death that upset it when it had first moved here from a small town in Russia. The sinister presence, then, was almost on the back of its mind...
And then it saw that the girl had gone.
So it tought up a lie to tell Bobinsky, a 'message from the mice' or so, and watched as it was delivered.
And then, so as to see the sinister presence that dwelled where Bobinsky could not go, it let go of the man and attached itself to a scrawny cat.
It gave the animal one command.
Follow the girl. Watch.
(A/N): So, for those of you who are completely confused, I was playing on a few things.
First thing, if you notice, does not seem any different in his first appearance than he does in his last. Except for one thing: he's smiling more often in the second.
This is part of how I came up with the theory of the Witchdoctor, a 'presence' of some sorts giving Bobinsky psychic abilities of sorts. Because I am one of the people that believe the mouse circus both does and doesn't exist at the same time (I have many complex theories about it... hehehe...).
Also, for a bit of information about the Witchdoctor (yes, it's mine, use it with credit in any story if you wish): it's a presence that grants certain abilities to its host in exchange for life (it has to be attached to a host to live). The reason it drove Bobinsky insane is because it felt the doll and real-world remants of the OM AND, for my one-reference-a-fanfic, 'an abandoned crutch' (not even close to an exact quote, I know that - haven't read that book in years) or three AND all the misery accompanying them.
Now, for why the cat doesn't seem crazy later? The Witchdoctor knew that the Cat was going to follow the kid somehow. So it was prepared for the waves of evil after 'tasting' Coraline (auras and such). So thus the Cat got his ability to speak and teleport and stuff like that from the Witchdoctor, and instead of returning to Bobinsky after the whole adventure was over with, it stayed with the Cat, who already knew how to use the powers, instead of Bobinsky, who had no idea what was going on the entire time.
So. I hope I haven't confused people too much. But I probably have.