Mushishi, Kyuuketsuhime Miyu (TV) Recommendations
Vampire Princess Miyu TV focuses, like Mushishi, on episodic stories that explore how darkness can enter any human being's story, and how we can either triumph or succumb to our circumstances. Both Miyu and Ginko serve as either a savior for those normally doomed, or an arbiter that knows the truth of when it is too late for rescue.
~ Both animes have a pretty dark feel and they are pretty much episodic.
~ In both series you rarely get a happy end that you would imagine although the problem is always solved.
~ They both involve supernatural beings, though in Mushishi they are some sort of form of life and cannot be seen by everyone while in Vampire Princess Miyu they are disguised as humans.