Other Swooshers might, for instance, be bats. Their heads were clandestinely pencilled at "Vetekatten", a popular café in downtown Stockholm, and I turned them into flapping beings of the Night on the spot. They are receiving some electric colouring right now, and someday, they might swoosh around in a book of mine. (One of those perpetual projects.)
Part of the charm is that they'll have no idea about this.