Ginko employs himself as a Mushi master (mushi-shi), traveling from place to place to research Mushi and aid people suffering from problems caused by them.
In terms of personality, Ginko is rather laid back, but can be very serious when it comes to protecting people from mushi. He also often stresses that the mushi are not evil, but they merely exist as a part of the nature and try to survive like every other living being.
Ginko has only one possession other than his clothing, but it is a formidable one. A box which he carries everywhere on his back. It resembles a small card catalog, and its compartments conceal all sorts of things, bowls, bottles, herbs, salt, paper, brushes, a mail cocoon, and more. The box can also serve as a stool, if necessary.
He lost his other eye and hair color when he tried to save Nui from the Ginko mushi that lived in the pond near where they lived. Nui protected Ginko by telling him to offer them as a sacrifice so the Ginko would let him be. He never saw Nui again and after nearly being consumed by the mushi he adopted the name Ginko to save himself.