Here’s a 100- word story for the Halloween season:
Witches can see ghosts, and ghosts can tell whether someone is a witch. But zombies don’t see anyone: they only smell the flesh of the living. Vampires scent blood from a long way away like sharks, so they too don’t actually need to see . The yeti, being an abominable snowman, is snow-blind, and skeletons have dry and empty eye-sockets.
I suppose all these speculations are rather a waste of time. Whichever creature I decide to dress up as at the fancy-dress party, there’s no need for me to go invisible. I might as well let everyone see me.