Queer

Mexico City is a terminal of space-time travel, a waiting room where you grab a quick drink while you wait for your train.

Murder is the national neurosis of Mexico.

I mean a definite possessing entity. And indeed, the psychological concept might well have been devised by the possessing entities, since nothing is more dangerous to a possessor than being seen as a separate invading creature by the host it has invaded. And for this reason the possessor shows itself only when absolutely necessary.