Ao no Exorcist Wiki
Ao no Exorcist Wiki

Volume 21 is the twenty-first volume of the manga series, Blue Exorcist (青の祓魔師 Ao no Ekusoshisuto) by Kazue Katō. The front cover features Rin Okumura.


Fight hellfire with hellfire!

An attack on Tokyo by a huge demon that is visible to almost everyone marks the start of an unprecedented outbreak of demonic activity around the world. While the Knights of the True Cross and the Japanese government scramble to contain the damage, Lightning's investigation into the Illuminati has pushed the Knights of the True Cross—and Yukio—just a little too far. Now Yukio rushes to confront Mephisto, determined to hear the truth of the circumstances of his and Rin's birth. Yet Mephisto, aloof as always, still seems to be pulling everyone's strings. For Yukio and Rin, there will be no easy answers…[3]

The Story So Far[]

Unknown to Rin Okumura, both human and demon blood runs in his veins. In an argument with his foster father, Father Fujimoto, Rin learns that Satan is his true father. Satan suddenly appears and tries to drag Rin down to Gehenna because Rin has inherited his power. Father Fujimoto fights to defend Rin, but dies in the process. Rin decides to become an Exorcist so he can someday defeat Satan and begins studying at the Exorcism Cram School under the instruction of his twin brother Yukio, who is already an Exorcist.

Rin and the others succeed in defeating the Impure King, awakened by the former exorcist, Todo. Meanwhile, Yukio fights Todo, and as the battle rages, he senses the same flame in his own eyes as his brother. Afraid, he keeps it a secret.

Later, mysterious events begin occurring around the globe orchestrated by a secret society known as the Illuminati.

Lightning and Suguro conduct an investigation on their own into the Illuminati and discover a place called Asylum on academy grounds. Asylum was the previous incarnation of the Exorcism Cram School of the Knights of the True Cross. There, they learn the shocking truth that the Order was producing hosts for possession by the demon kings.

When Yukio learns that the Knights of the True Cross is doing no different from the Illuminati's activities, he loses faith in everything and, gun in hand, chooses to die. But Satan, residing in his left eye, stops the bullet!![2]

In the next volume…[]

The seals binding the artificial Gehenna Gate are broken, and the world is gripped by demonic chaos! As nations around the world struggle to contain the outbreaks, Rin faces Mephisto, demanding to hear about his past. But is Rin ready to face the reality of his birth? Or is it all another lie serving more of Mephisto's schemes? Meanwhile, the Exwires try to figure out what to do while the Knights of the True Cross scramble to regroup. Without Rin and Yukio, everyone seems lost. The time has come at last for all of the young Exwires to become the Exorcists they were always meant to be…


It took a while but I'm glad I've gotten the story to the place I imagined when I started the series.

Enjoy the manga!

Cast of Characters[]

Info below retrieved from Viz Media.[2]

Rin Okumura

  • Born of a human mother and Satan, the God of Demons, Rin Okumura has powers he can barely control. After Satan kills Father Fujimoto, Rin's foster father, Rin decides to become an Exorcist so he can someday defeat Satan. Now a first-year student at True Cross Academy and an Exwire at the Exorcism Cram School, he hopes to someday become a Knight. When he draws the Koma Sword, he manifests his infernal power in the form of blue flames.

Yukio Okumura

  • Rin's brother. Hoping to become a doctor, he's a genius who is the youngest student ever to become an instructor at the Exorcism Cram School. An instructor in Demon Pharmaceuticals, he possesses the titles of Doctor and Dragoon. Todo told him that his true nature is that of a demon. And does Satan inhabit his left eye?!

Shiemi Moriyama

  • Daughter of the owner of Futsumaya, an Exorcist supply shop. She possesses the ability to become a Tamer and can summon a baby Greenman named Nee. She decided to quit the Exorcism Cram School, but she hasn't revealed the reason why.

Ryuji Suguro

  • Heir to the venerable Buddhist sect known as Myodha in Kyoto. He wants to achieve the titles of Dragoon and Aria. He is Lightning's apprentice and they are conducting an investigation together.

Renzo Shima

  • Once a pupil of Suguro's father and now Suguro's friend. Currently, he is a double agent providing information to both the Illuminati and the Knights of the True Cross.

Konekomaru Miwa

  • He was once a pupil of Suguro's father and is now Suguro's friend. He's an Exwire who hopes to become an Exorcist someday. He is small in size and has a quiet and composed personality.

Izumo Kamiki

  • An Exwire with the blood of shrine maidens. She has the ability to become a Tamer and can summon two white foxes. The Illuminati had taken her captive, but with help from Rin and the others, she escaped and settled her grudge against the insane professor Gedōin.

Noriko Paku

  • An old friend of Kamiki. The two girls joined the Exorcism Cram School together, but Paku dropped out when she couldn't keep up. Now she takes classes in the general curriculum at True Cross Academy Private High School.

Shura Kirigakure

  • A Senior Exorcist First Class who holds the titles of Knight, Tamer, Doctor and Aria. Rin and Yukio helped free her from a contract entered into by her ancestor.

Mephisto Pheles

  • President of True Cross Academy and head of the Exorcism Cram School. He was Father Fujimoto's friend, and now he is Rin and Yukio's guardian. The number two power in Gehenna and known as Samael, King of Time.


  • Mephisto Pheles's younger brother. The seventh strongest ruler in Gehenna who bears the title King of Earth. He received his freedom from Mephisto—with strings attached!—and became a student at True Cross Academy.

Arthur A. Angel

  • A Senior Exorcist First Class and the current Paladin. He wields the demon sword Caliban and is certain that Rin, as the bearer of Satan's blood, should be destroyed.

Lewin Light

  • An Arch Knight, he is Arthur's right-hand man as well as number two in the Order. An expert in Arias and summoning, he goes by the nickname "Lightning."

Osceola Redarm

  • Another Arch Knight, he is an inspector at the Mexico Branch. He arrest Lightning for assaulting K.R.C. Laboratory Director Drac Dragulescu.


  • Commander-in-Chief of the Illuminati. Known as the King of Light, he is the highest power in Gehenna. He plans to resurrect Satan and merge Assiah and Gehenna into one.

Shiro Fujimoto

  • The man who raised Rin and Yukio. He held the rank of Paladin, but Satan possessed him and he gave his life defending Rin. There is a possibility that the was a clone of Azazel created by Section 13.


  • A Cat Sidhe who was once Shiro's familiar. After Shiro's death, he began turning back into a demon. Rin saved him, and now the two are practically inseparable. His favorite drink is the catnip wine Shiro used to make.

Chapter List[]

Characters Introduced[]