Trinity Blood (Japanese: トリニティ・ブラッド, Hepburn: Toriniti Buraddo) 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 ongoing cold war between the Vatican, the human government, and the "New Human Empire", the government of the vampiric Methuselah.