Kyuketsuki Miyu
(Vampire Princess Miyu)
Four-part OAV series which explores the world of Japanese-style occult. Se Himiko is a reibaishya (spiritualist) who contracts herself out to solve mysteries of the supernatural, when she discovers a series of events which center around a very young-appearing vampire, Miyu, and her servant Larva.
The 4 OAV's are available from AnimEigo; the TV series is rumoured to be in the works for the near future.