Adashino (化野) is the doctor of a seaside village whom Ginko visits occasionally to sell Mushi-related items to, because his hobby is collecting such items. He keeps them in a shed behind his home. It is known that Adashino collects items from others besides Ginko, though they are not often named.
Adashino is a tall, fair-skinned individual with short, somewhat spiky, black hair and dark eyes. He is always seen wearing a dark yukata and a monocle.
- In the Japanese dub of the anime, Ginko addresses him as "Adashino-sensei" (化野先生). The sensei honorific is commonly used for doctors and teachers.
- It is never mentioned how Ginko and Adashino met.