Chrono Crusade - Holy War (Vol. 2)
This is the story of Sister Rosette, an elite exorcist in the Order of Magdalene, whose soul has been bound by alchemy to that of the devil Chrono.  Armed with sacred ammo, they form an unstoppable team, ready to wage war at a moments noticebecause when the gates of Hell are opened, someone's got to put the devils back!