Organisation: Kyoukouchou Kokumu Seishou Tokumu Bunshitsu

AX, short for Arcanum Cella Ex Dono Dei (Latin for Papal State Affairs Special Operations Section), serves as the special division of the Ministry of Holy Affairs. 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.

[Source: wiki]