Blue Exorcist

The artificial Gehenna Gate has completely opened, throwing the material world of Assiah into utter chaos as many humans have now begun to see demons. Amid everything, Yukio leaves the Knights of the True Cross and heads for the Illuminati. Rin decides that he must learn the secret of their birth. He embarks on a journey 40 years into the past with Mephisto's guidance.

Having lost her family in a fire and with nowhere left to go, Yuri meets Shiro, who is on the run from Section 13. Shiro is brought back by the exorcists pursuing him, and he makes a request of Mephisto. Meanwhile, Yuri is taken to Asylum, a school for exorcists-in-training, due to her ability to see demons. As he watches the two grow up, Rin witnesses the true nature of Asylum and Section 13.

Shiro believes that an exorcist's duty is to destroy demons, while Yuri believes that an exorcist's duty is to help people, and advocates for building friendly relationships with demons. Shiro, irritated by Yuri's attitude, harshly confronts her.

Nine years have passed. Shiro, Yuri, Rick and the others gained experience and grew up. Meanwhile, in Section 13, Elixir experiments continued.

After his incarnation, Rinka absorbed knowledge, recognizing himself as the Demon God Satan.

Yuri heads to Satan, who has holed himself up in Section 13. Satan accepts Yuri and chooses to live with her.

A newborn Rin, covered in blue flames, attacked the surrounding exorcists one after another.