There is no such thing as a fallen angel, no such creature. That is pure deception, unmerited traditional illusion. There will be a war in Heaven, there has not been one there yet. Some Angels may have swords, or swords may be symbolic of somethingelse, I am not sure. The Devil can follow after humans, yes. But only as a predator stalking his prey.
Peace.
I doubt there is any such creatures as god,satan, angels and demons