When those from Earth step on a way to get to Foo, they may not get there completely. They only partially arrive, since their bodies and souls stay on Earth. They are called whisps, and are similar to ghosts. They are members of governing councils and boards. They are very vulnerable to flattery, and wish most for soul stones, to become whole. The only way to kill a whisp is to suck it up by anything, like from a vacuum. Janet Frore is a Whisp.