Oh man, Ghostwriter. Gooey Gus gave me nightmares as a kid. I was too scared even to go to the toilet because I imagined he'd be sitting in there when I opened the door.
I'm just now realizing another level of absurdity here: Ghostwriter couldn't speak or hear, only read and write. Yet he's (I think it was established GW was a he), flying down the information superhighway on a modem (which works acoustically).