Blue Exorcist: Season 4

The Knights of the True Cross begin holding discussions among the higher ranks to establish countermeasures to deal with the influx of low and mid-level demons caused by the Illuminati. Soon after this meeting, Rin and the other cram school students are informed by Mephisto that the Exorcism Certification Exams will be held sooner than originally planned due to the immediate demand for more Exorcists. To assist with this change, Arch Knight Lightning is appointed as a new instructor for the cram

Yukio starts investigating the true nature of the power that has started manifesting within his eyes. The situations in which this power appears all had one thing in common: they only appear when he is put in life-threatening situations. Yukio puts his own life on the line in a series of dangerous stunts in an attempt to awaken this hidden power. A day earlier, Rin, Konekomaru and Renzo begin studying for the Exorcism Certification Exams without Ryuji, who is out running errands for Lightning. R

Mephisto deduces that Shura returned to her hometown of Towada in Aomori Prefecture. He instructs Rin and Yukio to go there and search for her. The brothers arrive in the snow-covered city near the Lake Towada area, where they stay lodging for the night. The next morning, Shura confronts Hachirotaro Okami, a powerful Hydra who claims territory at the lake and its surrounding areas. Initially summoning her because someone was snooping around his territory, Hachiro uses the opportunity to urge Shu

Shura awakens outside to discover Hachiro right in front of her, who begins using his hypnotic powers to control her body. Rin and Yukio arrive to rescue Shura, but Hachiro pushes Rin back and uses his hypnosis to incapacitate Yukio. Hachiro plans to use Yukio and force Shura to conceive a child, but Rin uses his flames on the demon and breaks his control over them. Shura attempts to use her sword to commit suicide, but Hachiro stops her from doing so. Seeing as no party present wants Shura to p

As Shura sinks into the lake with Hachiro, she remembers the days she spent with Shiro. Meanwhile, Rin, Yukio and Renzo act fast to save Shura, with Rin using his flames to burn open the multiple snake heads of the demon. Hachiro loses his grip on Shura during the assault and she attempts to escape, but the demon recaptures her. Hachiro resurfaces with Shura and confronts Rin and the others, regenerating his heads in the process. As Yukio and Renzo attempt to rescue Shura, Hachiro swats Renzo aw

Mephisto reveals to Shura that the Illuminati managed to capture Hachiro. Shura threatens to harm Mephisto if he continues to meddle with the Okumura brothers. Later that night, Lightning begins his investigation into the Illuminati with Ryuji. Based on circumstantial evidence, Lightning speculates that the Japan branch of the True Cross Order is somehow directly tied to the Illuminati's founding and the Blue Night incident. The next morning, after receiving Rin's confession, Shiemi worries that

Lightning and Ryuji visit the monastery to get a firsthand account of what occurred during the Blue Night. Lightning discovered the three monks living there formerly held positions at the Cross True Japan branch. Lightning threatens to kill one of the monks, named Tadashi Misumi, if he does not divulge information. Ryuji cools Lightning down as Tadashi reveals that his former position was an Elixir researcher at Section 13. Tadashi suddenly dies due to breaking his Morinath contract. With this i

As the investigation duo depart Mephisto, Lightning makes his way through Vatican headquarters to visit Azazel, a demon who was a member of the original Grigori. The next morning at school, it is revealed that Shiemi has suddenly declined to take the Exorcist Certification Exams and intends on leaving the cram school. Despite blindsiding her friends with this news, Shiemi displays her enthusiasm about their upcoming Christmas / birthday party during winter break and promises she will still atten

Yukio wants to discover the truth behind their births, while Rin believes there is no reason to know. Rin's opinion agitates Yukio as he gives up on the conversation and heads back to sleep. A week later around New Year's Eve, Rin, Yukio and the Exwires head to Kyoto to attend the wedding of Juzo and Mamushi. As Yukio seemingly behaves normally, Rin senses something is off with him. Elsewhere, Lightning resumes his search for the truth behind Section 13 as he confronts Drac Drăgulescu, a man who

The Exorcists depart for Ikebukuro to battle the cyclops. Shura is assisted by Lightning and able to use her katana, temporarily reinforced by a high-level ice demon, to kill it. As a result of the demon's rampage, a cenotaph which sealed away shadow demons was damaged, causing many of them to escape. The Exorcists advance to eliminate the shadows. During the battle, Lightning gets arrested by Arc Knight Osceola Redarm for his earlier assault on Drac. Before being escorted, Lightning slips away

Mephisto is summoned to the Japanese prime minister's office for a private late-night meeting, where he pushes the minister to publicly acknowledge the existence of demons to avoid a public relations disaster. The next morning, Shiemi and Ryuji inform Rin of Yukio's current mental state. Meanwhile, the prime minister organizes a press conference where he plans to inform the country about demons alongside the True Cross Japan branch. During the conference, Yukio confronts Mephisto and demands to

Rin and the Exwires successfully break Yukio out of his holding cell. However, Yukio turns on his brother and explains that the True Cross Order is no different than the Illuminati, even creating their own opposition. Suddenly, Renzo is hoisted down on an Illuminati helicopter, revealing that Yukio has accepted Lucifer's offer to join their organization. Rin uses the Kouma Sword in an attempt to stop Yukio, however his brother's eyes break the sword in half as Satan uses them to communicate his