My sister and I had a weird character once on the Oujia which claimed to be the devil.
Funny thing with that one was that he/she/it wasn't actually going to the letters on the oujia board, but instead sort of writing letters through the oracle thingee. Like actually making the shape of an A or a B or whatever.
I had trouble figuring out the letters, but my sister seemed to be able to. (Of course, maybe she was doing it afterall!