Characters

Tatsuhiko Shido, P.I. - Shido is a private investigator, and he's also a vampire.

Guni - Guni is a city spirit and Shido's closest friend.

Detective Yayoi Matsunaga - Yayoi is a member of the NOS, an organization that investigates nightbreed attacks. She occasionally employs Shido on some of her cases.

Riho - Riho is a teenage girl who became an orphan when a Night Breed killed her parents. Yayoi and Shido took her under their care. Now, she goes to school and works part-time as Shido's secretary.

Sensei Tatsuhiko - Sensei Tatsuhiko was a good friend of Shido's for many years before he passed away from old age. Shido learned his blood sword technique from him. (Yes, this is actually a picture of Kagome's grandfather from Inuyasha; he's actually related to a couple of characters from the series. I'm still working on the story.)