Notice that frogs are also extraordinarily sensitive.
Their skin is permeable.
They literally absorb aspects of their environment.
Biologists often use frogs as indicator species because they are among the first animals to suffer when an ecosystem becomes unhealthy.
Symbolically that's fascinating.
The person who can move between worlds also becomes unusually sensitive to them.
They notice shifts others ignore.
The cost of permeability is vulnerability.
The gift is perception.