Blue Exorcist - S03

At True Cross Academy, Rin Okumura stumbles onto the first signs that something is wrong, all without realizing it: ordinary people have started to see the invisible creatures that roam the human realm, Assiah. Rin takes this as a chance to make a new friend, but his twin brother, Yukio, feels more burdened than ever. He has stayed quiet about his awakened powers, unable to grasp their scale or what they mean. While Rin and his friends get ready for the annual Exorcist Certification Exam, the True Cross Order has found the first artificial gate to Gehenna, the demonic realm. Seeing how big it is and the advanced technology that made it, the exorcists realize they are dealing with the Illuminati, an extremely wealthy and powerful organization. On top of that, the inscrutable Illuminati have planted three spies inside the True Cross Order, and one may be hiding among the aspiring exorcists sworn to protect mankind from the demonic threat.