Blue Exorcist volume 16 features story and art by Kazue Kato.

The surge of demonic activity around the world has the highest levels of the Knights of the True Cross worried. An important meeting at the Vatican will have serious effects on the lives of Rin and his Exwire friends. Back at True Cross Academy, the students get a sense that something is brewing with the arrival of an unexpected and definitely unconventional new instructor! Meanwhile, Yukio struggles to understand the strange fire in his eyes, a fire he has kept secret from everyone. Can he confront the flames inside him alone or will it consume him?