In all seriousness though, a Mushi is a creature that exists more in nature's realm than humanities realm and there are few people who can even see them. Out of these people some become Mushi-shi which are kind of like traveling exterminators, but they don't always kill the Mushi.
Mushishi is 26 episodes revolving around Ginko who is a Mushishi with white hair and one green eye. Want to know how he lost his eye?..Watch the anime!
There are very few recurring characters other than Ginko, two I believe.
The storytelling is slow at times and some of the characters that the animators probably think wouldn't matter in the big picture aren't creatively and individually drawn, so they appear reuse their character faces a lot(you see the same father wearing a different Kimono and fathering a whole bunch of people).
Which brings me to another strong point in Mushishi. The backgrounds, the people's clothes, the house, and many more elements are all set in traditional ancient Chinese architecture and garb. There are a lot of snowy episodes and a lot of forest episodes. This gets repetitive at times, but its so beautiful who really cares, and also Ginko wears modern clothes at all times.
This anime is not for the blade-toting adrenaline anime junkie sure there's action but there's no Hollows, no ninjas, and no alchemy. There's just beautiful animation and immensely rich, and deep characters. Also an underlying sense of "wow don't freak out just calm down for a minute and let me fix it" presented by Ginko in reference to the people freaked out by the Mushi. There's a lesson in there somewhere, just think about it :)
Watch it for an interesting calmed down social commentary and a beautifully presented animation. read more