[SamuraiAlchemistNinja]

Well, Trinity Blood is set after armageddon in the future. There are vampires, and then there's these Crusalas or something who suppossedly feed on vampires (though the only one I know of it Abel, and he's never "eaten" any vampires before lol...just killed them ) There's Ester, who accompanies Abel in trying to unite Terrens (humans) and Methusalas (predominant vampires) But there's the Rosencrouats (sp?) who are vampires who don't want Terrens and vampires to coexist peacefully. That's about the jist of what I've come to understand.