Rin Okumura
Main Characters
Yukio Okumura
Exwires
Ryuji Suguro
Shiemi Moriyama
Izumo Kamiki
Konekomaru Miwa
Renzo Shima
True Cross Order
Mephisto Pheles
Rin Okumura is the fifteen-year-old protagonist of the story. He is a son of Satan born from a human woman and is the inheritor of Satan's powers. His powers were sealed at birth into the demon-slaying blade Kurikara by Mephisto Pheles, the True Cross Academy principal, allowing him to live a normal human life for nearly 15 years with his twin brother Yukio and his foster father Shiro Fujimoto.
Yukio Okumura is Rin's younger twin brother. When it was discovered that the woman impregnated by Satan was going to have twins, it was believed that Satan's powers would be split between them. Due to the weakness of Yukio's body, however, he did not inherit any of Satan's powers, thus being born fully human with the full extent of Satan's powers going to Rin. Yukio did, however, receive a spirit wound at birth from his brother, which allowed him to be aware of demons for as long as he can remember.
Ryuji Suguro (nicknamed "Bon") is a stubborn and hot-tempered individual. Despite his delinquent appearance and attitude, he is very hardworking and the best student in class. Ryuji is the heir to the Cursed Temple in Kyoto. Because of the destruction of the temple in the Blue Night and his anger towards his father Tatsuma Suguro, he swears he will defeat Satan and rebuild his Temple.
Shiemi Moriyama is the daughter of the woman who runs an Exorcist-only shop. She is kind and has an abiding love of gardening, but often lacks confidence in herself. Before the series, Shiemi never went out of her home and tended to the garden with her grandmother. After her grandmother died, Rin and Yukio exorcise the demon that was leeching her life force and she decides to become an Exorcist.
Izumo Kamiki is easily one of the best students and she is aware of it. She has a tsundere attitude and is offensive towards everyone except her childhood friend Paku, who was the only one in her elementary school who would talk to her. Very prideful and often difficult to talk to, Izumo does care about her fellow Esquires and is the first of Rin's classmates to accept Rin after his identity as Satan's son was revealed.
Konekomaru Miwa is a timid but brilliant individual, able to come up with complex strategies in a short window of time. He is very loyal to Ryuji and Renzo, since they grew up together at the same Temple in Kyoto. He is kind to everyone, but it takes long for him to reconcile with Rin after discovering his secret, despite seeing his true character. He is an orphan and the surviving head of the Miwa family. He plans to achieve the Meister in Aria.
Renzo Shima is a very carefree yet fearful character. He is very loyal to Bon and Konekomaru, since both grew up with him at the Cursed Temple in Kyoto. Renzo is the second of the cast who accepts Rin after discovering his identity, finding ignoring Rin to be troublesome. He is infatuated with Izumo, obsessed with women. In elementary school, he was referred to as the "Erotic Demon". Now that he is in high-school, he is trying to be more refined.
Mephisto Pheles is the Chairman of True Cross Academy's Japanese branch. He is portrayed as a man with more money than sense but is very cheap when it comes to spending on others. After Shiro Fujimoto's death, he is ordered to kill Rin but instead accepts Rin's proposal of becoming an Exorcist and enrolled him into True Cross Academy. Mephisto is a powerful exorcist (holds a Meister in Honorary Knight, was able to subdue Amaimon while holding a berserk Rin off) and claims that he desires to "bring peace to both Assiah and Gehenna".
Shiro Fujimoto
Shiro Fujimoto is a priest at the Southern Cross Monastery, a Paladin in the True Cross Order (the title awarded to the strongest exorcist), Shura Kirigakure's mentor, and foster father to Rin and Yukio Okumura. He was qualified as an Knight, Dragoon, Doctor, Aria and Tamer through his cait sith familiar, which he called Kuro. Shiro is a man dedicated to his duties and was considered the strongest exorcist. Stealing the demon-slaying sword Kurikara, Shiro and Mephisto ultimately used the sword to seal the demon heart of the son of Satan and Yuri Egin. Shiro then adopted Yuri Egin's children, Yukio who did not inherit Satan's power, and Rin, full inheritor of Satan's powers.
Shura Kirigakure
Shura Kirigakure is an Upper First Class Exorcist. She trained under the guidance of Shiro Fujimoto to obtain the title "Meister" in Knight and can draw a demon sword from a symbol above her chest when she states, "Devour the Eight Princesses, slay the Serpent". Her sword skills allow her to fight on par with upper level demons like Amaimon. Frequently chipper and obnoxious, Shura is carefree about her job, as she drinks alcohol in excess and oversleeps. She appears to harbor a dark past, as she claims Shiro "came and rescued" her.
Igor Neuhaus
Igor Neuhaus is an Upper First Class Exorcist as well as lecturer in the Academy, who obtained the titles of Tamer, Doctor and Aria. He wears an eyepatch over his left eye, and has Aria incantations and magic circles tattooed on both arms. He had a run-in with Satan when he was younger, which robbed him of his family and the sight in his left eye, which is why he holds immense hatred for Satan and demons that are related to Satan. Yet ironically, he is extremely loyal to Mephisto, willing to listen to his every command, which is why he stopped his attacks on Rin prior to the latter becoming an Exorcist.
Arthur Auguste Angel is the newly appointed Paladin. He was ordered by the Grigori to interrogate Mephisto and captured Rin as evidence. Arthur is a respected exorcist with dubious ethics, as said by Shura to be like a saint on the outside but really a devil inside. He uses the sentient demon sword Caliburn. When speaking, Caliburn shows extreme affection towards him and talks like a love-struck teenage girl.
Arthur Auguste Angel
Other Characters
Amaimon
Amaimon is the "King of the Earth" and another son of Satan. Among the Eight Demon Kings, he is the seventh in strength. Amaimon has vast control over the land, such as being able to create earthquakes. He is eccentric and hates being laughed at or ignored. Unlike his father and elder brother Mephisto Pheles, Amaimon initially had little interest in Rin, instead wishing to tour Japan upon arrival, but quickly became obsessed with his younger half-brother after fighting him.
Satan
Satan is the god of demons who wishes take control of the humans' world, Assiah. He is also the father of Rin and Yukio Okumura with both of them being born from a human mother. When Rin awakes his demonic powers inherited from his father, Satan takes control of Rin's guardian, Shiro Fujimoto, in order to encounter and use his son to destroy Assiah. However, Fujimoto's suicide causes him to lose contact with Rin.[ch. 1] In the anime series, Satan once again tries to achieve his plans by using Yukio as his vessel, but Yukio is freed by Rin.
