Nebula Caligo

a personified summer storm, they have two forms

their hair is made of mist/smoke, it swirls around their feet and shoulders.
their "wings" are budding tree branches.
their halo floats a bit behind their head.
they always have a blank face with a disinterested or wide-eyed expression.
their physical appearance is similar to a young boy.
their sclera are dark, but not black.