AX Agency

The AX Agencyshort for Arcanum Cella Ex Dono Dei (Papal State Affairs Special Operations Section), is a secret subdivision of the Ministry of Holy Affairs. It is headed by Caterina Sforza. For those who participate in this unit, they will called as the AX Agents. The agents are all elite priests and nuns, trained in different arts of combat, many of whom have special abilities granted to them by lost technologies. The members of the AX unit serve under Cardinal Caterina Sforza, and are often referred to as deputy enforcers.

They are often sent to investigate issues relating to or involving vampires.

Trinity Blood is a series set in a post-apocalyptic world. The war between humans (Terrans) and vampires (Methuselah) continues as a struggle between two factions: the Vatican and the New Human Empire. Yet, amidst the bloodshed and violence, many desire a peaceful co-existence between the two species. However, standing between them and this goal is the Rosenkreuz Orden, a group of extremists who manipulate the two sides and pit them against each other.