Blue Exorcist - S04

Demonic activity has surged globally, fueled by the Illuminati's corruption and interference. In response, the Vatican moves up its annual Exorcist Certification Exam, aiming to recruit as many exorcists as possible to fight the growing threat. Lewin "Lightning" Light, a top exorcist from the Vatican, arrives at True Cross Academy to help students prepare. His effortless skill in dispelling demons catches the attention of Ryuuji "Bon" Suguro, who had lost his drive to continue training-yet Lewin unexpectedly takes him on as an apprentice. Meanwhile, as the crisis deepens, twin brothers Rin and Yukio Okumura are sent to find the missing exorcist Shura Kirigakure. She appears to be bound by an ancient contract with a powerful, immortal demon lurking in Aomori Prefecture's treacherous snowy mountains.