Trinity Blood is a series of Japanese light novels written by Sunao
Yoshida with illustrations by Thores Shibamoto and originally serialized
in The Sneaker. Set 900 years after an apocalyptic war between humans
and vampires, the series focuses on the on-going cold war between the
Vatican, the human government, and the "Empire," the government of the
vampiric Methuselah. Fighting on the Vatican's side is Abel Nightroad, a
Crusnik - a vampire that feeds on vampires. A blend of sci-fi, fantasy,
and political intrigue, as some in the Vatican and the Empire strive
for peace, the Rosen Kreuz Order will do anything to stop it.