Rin Okumura/Synopsis

==History==
Rin Okumura is the half human/ half demon Son of Satan and the elder twin brother to professional exorcist; Yukio Okumura. When he and his younger brother were expected to be born, Satan went around trying to possess exorcists in an attempt to save their mother; Yuri Egin; from being executed because the Vatican found out she was pregnant with the son of Satan. However every exorcist he attempted to possess was subsequently murdered by his blue flames due to his overwhelming power, this event would later be called the blue night. Two exorcists; Shiro Fujimoto and Mephisto Pheles (also a son of Satan) were tasked with finding her. When they found her she had already given birth two her two twins; Rin and Yukio Okumura. She died from childbirth, but instead of taking in the twins for execution, Shiro Fujimoto decided to raise the kids in secret; however he had to seal Rin's demon powers in the 4 Koma Sword until he was ready.
Sixteen years have passed an Rin has begun to show signs of his merging demon powers after an encounter with a demon who tried to bring him to Gehenna(The realm of hell) to meet Satan. Father Fujimoto saved him and brings him back home to tell him the truth; that he's the son of Satan. Father Fujimoto hands Rin the 4 Koma Sword and warns him that unsheathing the sword will strip him of his humanity forever. Satan decides to possess Fujimoto and with his powers; opening a portal to the world of Gehenna so he can take Rin home with him. Father Fujimoto, regains enough control to stab himself in the heart; and before he dies proclaims Rin as his son.Desperate, Rin unsheathes his sword and unlocks his full demonic powers and with it he destroys the portal.
At Father Fujimoto's funeral, Rin swears to seek revenge on Satan for killing Fujimoto. But to do that he must train to become an exorcist at the Full cross Acadeemy led by Mephisto Pheles.
==Plot and Story==
===Beginning arc===
After getting into another fight with Reiji Shiratori and his gang, and being fired from another one of his part-time jobs, Rin's guardian, Shirō, strictly reminded Rin that he would have to make a living on his own someday. After Yukio treated Rin's wounds, Yukio asked him if he would be alright without him around since he was going to move from the church. Rin admitted that he was also worried, but he said that he had done nothing wrong. After being prompted by Izumi and Maruta on going to the job interview, Rin saw Shirō consulting a girl named Yui Sakamoto and commented that being an Exorcist must be hard with having to get rid of things that don't even exist, to which Shirō disagreed and claimed that demons exist within human hearts.
Later, after Rin called Yukio that he was able to get a job at the supermarket (with the help of his natural talent at cooking), he saw Yui chasing after her scarf. When Rin caught the scarf and was about to give it back to her, he suddenly saw a monkey-like creature there took the scarf out of his hand and ran off. While Rin was chasing after the creature as they thrashed around in the supermarket, it suddenly went on top of some boxes, which were going to fall on Yui. Rin protected her from them, but the girl fell unconscious. Shirō, Yukio, and the others were waiting for Rin to come home to celebrate, but Rin was nowhere to be seen. Worried, Yukio went outside to look for him, and eventually found Rin at the park. Rin told Yukio that he was too ashamed to come home after he got fired from his job, but couldn't explain him why. Then, when they both arrived back home, Rin saw Yui again, along with her father, who came by to thank Rin for saving her.
The next day, after he woke up and saw a letter from Yukio saying that he had to leave earlier than planned, Rin started to see a lot of small black creatures floating in the sky. He went outside and began to wonder why no one around him was noticing them. Then suddenly, Reiji and his gang appeared and asked Rin to come along with him to have a talk. At the alley, Reiji said that he came to apologize and tried to give Rin some money as a request for him not to mention about the fight that they had the other day, as it would damage his own reputation and his chance of getting into the True Cross Academy. Rin declined the offer, but when Reiji said that he should accept the money because his family was poor and that Yukio got into the Academy only for his grades, Rin punched him, saying that he could insult him all he wanted, but not to Yukio. Then, as Reiji was about to burn Rin with a heated steel pole, blue flames started to appear from Rin, surprising himself. Astaroth, the demon whom was possessing Reiji, said that the blue flames were the proof of Satan's offspring and was about to take Rin to him, but Shirō suddenly arrived and exorcised Astaroth from Reiji. Afterwards, a horde of demons started to appear and attacked Shirō and Rin, to which Shirō stated that they won't stop at nothing to bring Rin to Satan.
When they finally arrived home, Shirō and the other Exorcists placed many protection barriers surrounding the chapel. Shirō also gave Rin the sword Kurikara, which was used to seal his demonic powers. Then, Astaroth (possessing Reiji again) and his demon minions started ambushing the church, but the Exorcists managed to defeat them. After the battle, Rin had a harsh argument with Shirō, believing that he was just wanted to get rid of him. Mentally shocked from hearing Rin's accusation, Shirō suddenly got possessed by Satan who came to drag Rin to Gehenna. After Satan opened the Gehenna Gate, Shirō, managing to regain control of his body, stabbed himself in the heart and proclaimed that Rin was his son before he died. As he remembered his memories with Shirō, Rin drew out Kurikara, which returned his demonic powers, and destroyed the Gehenna Gate, leaving Rin and Shirō to remain in Assiah.
After Shirō's funeral, Rin stayed behind at his grave. When he was about to call a phone number of Shirō's friend, a phone near Rin rang. To his surprise, he saw a lot of Exorcists surrounding him with Mephisto Pheles. Mephisto gave Rin three choices: him killing them, them killing Rin, or Rin committing suicide. Rin choose neither of those options and instead decided to become an Exorcist, stating that he didn't want anyone else to die. Hearing this, Mephisto became amused and accepted Rin's idea, letting Rin start at the True Cross Academy.
===True Cross Academy arc===
The next day, Mephisto brought Rin, along with Yukio, to the True Cross Academy. Rin was surprised to see Yukio was the year's freshmen representative, but was glad to see his younger brother fulfilling his dream of becoming a doctor. While Rin was looking around the Academy, he later met with Mephisto, who warned Rin to control his temper, as his blue flames would easily respond to his emotions and expose his identity as the son of Satan. With that said, Mephisto gave Rin a magic key that allowed him to enter the school for Exorcists from any door. There, Rin met with his classmates and, to Rin's surprise, Yukio entered the classroom introducing himself as a teacher. Yukio revealed to his older brother that ever since he received a mashou from Rin when they were born, he were capable of seeing demons, and Rin was the only one who didn't know the truth. As they argued, a vial of foul-smelling liquid accidentally fell onto the ground, which lured a horde of Hobgoblins. While they were fighting them, Yukio called Rin an idiot and accused him for being responsible for Shirō's death as he pointed his gun at him. Rin said that he was right to call him that, but he exclaimed that he wouldn't dare point a weapon at his own brother as he slew a huge Hobgoblin. After the fight, when Yukio asked Rin of how Shirō's final moments were, Rin answered that he was unbelievably cool. Later, Rin found himself sharing one room with Yukio, even though they were the only residents of the entire dorm. Yukio said that he would need to keep watch over Rin, much to Rin's dismay.
Later, when Rin heard from Yukio that he had received an exorcism request, Rin convinced Yukio to let him come with him, as he would learn more out in the field. While Yukio was inside the Exorcist Shop to buy some supplies, Rin noticed another nearby stairway, which leads to a beautiful garden. There, he saw Shiemi Moriyama, the shopkeeper's daughter. At first, she thought that he was a demon, since he accidentally broke the gate that had a barrier around it, but soon afterwards, Shiemi apologized to Rin as he was helping her with her flowers. After Shiemi talked to Rin about her wish to find the Garden of Amahara, Shiemi's mother brought Yukio to have him examine Shiemi's legs, which were infected by a demon living within the garden. Shiemi suddenly collapsed after she disobeyed her mother's order to abandon the garden for the sake of her health. After hearing from Shiemi's mother about Shiemi's past with her late grandmother, Rin went to Shiemi and told her that her grandmother never wanted her to be a prisoner of the garden. As soon as Shiemi realized that what she had been doing was wrong, an angry Dökkálfr appeared and possessed Shiemi. Rin couldn't directly attack the Dökkálfr since it was using Shiemi as a shield, but Yukio shot a nutrient capsule bullet, letting Rin kill the demon when it was separated from Shiemi. After the battle, Shiemi was able to use her legs again and reconcile with her mother. The next morning, Rin saw Shiemi introduced as a new student in his class, since she resolved to learn more about the world around her, and as thanks to Rin and Yukio for helping her.
A few days after Shiemi's enrollment, Yukio handed out their test results. Rin had 2/100 correct while one of his classmates, Ryūji Suguro, had 98/100. Ryūji criticized Rin and they got into a verbal fight, but were interrupted when Renzō Shima, Konekomaru Miwa, and Yukio held them back. During the class' P.E. session in the arena, Rin and Ryūji competed in a race to see who would be the last one standing while being chased by a rampaging Leaper. Rin proved to be faster than Ryūji, and in his anger, Ryūji kicked Rin and got into another fight, but their teacher Kaoru Tsubaki stopped their quarrel. After Renzō and Konekomaru explained Rin about Ryūji's dark past and his goal to defeat Satan, Ryūji challenged Rin to touch the Leaper without it attacking him, so he could prove that he was determined to become an Exorcist. Rin declined and told Ryūji that he wasn't stupid to risk his life like that because he also had a goal to achieve. That angered Ryūji, so he went down to toward the Leaper himself to prove he was brave enough. However, the Leaper could feel the anguish from Ryūji's mind and was about to bite him, but Rin quickly jumped in and took the demon's attack for him. Rin looked at the Leaper in the eye and ordered it to let go. After that, while back in the classroom, Rin tried to study, but he couldn’t concentrate because his bangs were in the way.
However, Ryūji then came to Rin and loaned him a hair clip to put his hair up and thanked him for saving him. Rin was surprised and thought it was creepy and an omen, which annoyed Ryūji. While Rin, along with his classmates, were staying at his dorm for a week to study for the Exwire authorization exams, Rin couldn't help but notice that Izumo Kamiki was treating Shiemi as her servant, which began to worry him.
Confronted Shiemi about it, Shiemi dismissed that notion, exclaiming that she was helping a friend. However, they stopped arguing when they heard Izumo and her friend Noriko Paku's screams coming from the girl's room, and Rin told Shiemi to go bring Yukio as he rushed to their help. After Rin saved Izumo from her two Byakko familiars who were about to attack her for sensing her fear, he fought against the Naberius who snuck into the dorm, while Shiemi came to treat Noriko's wounds. Since Rin couldn't risk unsheathing Kurikara and exposing his true form in front of his peers, the Naberius easily pinned Rin down and started to strangle him. Thankfully, Yukio arrived in time and shot at the Naberius, forcing it to retreat. After that, when Rin noticed a crying Izumo blaming herself for not being able to do anything to help Noriko, he gave her his shirt, telling her to go change.
Next morning, Izumo came to Rin to give back his shirt and threatened him not to tell anyone for seeing her crying, as well as thanking him for saving her. Later, while Rin and his classmates received the Baryon punishment for having a vicious quarrel in the classroom, Yukio lectured them that no Exorcist should ever fight alone. Shortly after Yukio left for a mission, a blackout occurred at their dorm and the same Naberius appeared again. After Shiemi had her Greenman familiar, Nii-chan, provide a tree barricade to prevent the Naberius from getting closer, Rin volunteered to lure the demon away from his classmates while they make a run for it.
However, the Naberius spilt itself into two bodies and had one chase after Rin while the other stayed behind to try to bypass Shiemi’s wooden defense. Rin ran to the dorm’s power control room to turn the lights back on, but the Naberius threw him back away from the controls. When Rin exposed his blue flames, one of the Academy’s teachers, Igor Neuhaus, appeared from the shadows. Igor revealed that he was responsible for the attacks on his dorm, so he could confirm that Rin was Satan’s son. Angered by his actions, Rin unsheathed Kurikara and slew the Naberius with his flames, causing Igor to flee from the scene.
===Training Camp arc===
Shura confiscates Kurikara for the time being and summer break begins. The normal students leave but the Exwires take a three-day training camp. They set up camp where Rin enjoys his time with his friends. Yukio assigns them a solo mission to go after three lanterns in three days but warns that demons will come out at night. Shura also warns Rin not to let out his flames for it may be seeable at night. The mission begins where the group are attacked by demon moths. Ryūji, Konekomaru, and Renzō are able to protect themselves and Izumo uses her familiars. Shiemi plans to use Nii-chan for help but one of the moths rips her circle and Nii-chan disappears. That is when a large moth (probably its leader and guardian of the forest) appears in front of her. Rin hear Shiemi scream and goes after her, finding her injured due to the earlier attack from the large insect. 
When he sees her bleeding, Rin let his blue flames out, incinerating the moths. But the surviving sees they are Satan's flames and fly off to tell their boss. Rin calms himself down and tries to wake up Shiemi when Ryūji appears, asking what the blue light was. Rin's flames were very bright so it was hard for Ryūji to see. Renzō appears, letting out his fear of bugs when the two get a text message from Konekomaru that he found a lantern. They go to the depths of the forest together and find out that it's a Peg Lantern, a type of demon that wakes up when lit and likes to consume people into its fire, especially women.
Since it was large, the group realized that the mission required cooperation. Konekomaru devises a plan involving the five with Rin pulling the lantern, Shiemi feeding it so its flame won't go out, and the three Aria deflecting themselves from the moths. Rin stops, where the group is in front of a bug swamp with a broken bridge. Ryūji has an idea to have the Peg Lantern cross the swamp. Rin carries Shiemi and Ryūji awakes the Lantern. Seeing Shiemi, it goes after her. When it crosses, Renzō and Konekomaru at the other side seals the demon. Everything went okay until Rin is attacked by the giant moth. Rin tells them to leave, but Ryūji saves him by sealing the moth. They run off with the Peg Lantern as Ryūji tells Rin he helped as Rin helped Ryūji get over his embarrassment of saying he'll defeat Satan. He, Renzō, Konekomaru, and Shiemi tell Rin that they are his allies and will be there for him. Rin is glad but starts to think what happens if they find out that he's the son of Satan.
The group arrives to find Takara and Izumo had already finished their part of the mission. Then, Amaimon appears and unleashes his pet Hobgoblin, Behemoth. Seeing the students in danger, Shura protects the area with a magic circle and dumps holy water on them (except Rin). Shura suggests that Rin should fight Amaimon and gives him Kurikara. Rin is unsure about the choice when Shiemi suddenly walks out of the circle. There is a bug inside Shiemi controlling her and Amaimon kidnaps her. Rin goes after her and Ryūji, Renzō, and Konekomaru follow with flares. Amaimon tries to provoke Rin into using his sword by making Shiemi his bride or threatening to pluck out her eyes. The three monks-in-training intervene where Konekomaru accidentally puffs up Amaimon's hornlike hair. This provokes Amaimon by hitting Renzō and breaking Konekomaru's arm. He strangles Ryūji who tells Rin why he is acting weird and goes off on his own. Seeing his allies in danger, Rin decides to uses his flames as an act of kindness and fights Amaimon. They go into a heated battle where Yukio find the group injured and head them out of the forest to safety. Meanwhile, Mephisto watches. Rin's flames start to increase as he fights Amaimon. He is about to slice him, but Amaimon stops the blade.
He recognizes that Rin's flames are as powerful as Satan's, their father. Then, Rin lets out a roar of flames that instantly defeat Amaimon. Mephisto claps, seeing that Amaimon has done well and was surprised that Rin is able to defeat him at this level. Then he imprisons Amaimon into a large cuckoo clock only for Rin to slice and destroy it. Mephisto is startled by this. Rin's flames are increasing and consuming him as Rin becomes more violent and beast-like. Mephisto vanishes the clock with Amaimon and subdues Rin by sheathing Kurikara. At this point, the Paladin Arthur Auguste Angel arrives and confronts Mephisto and Shura about hiding the existence of Rin. Rin is taken into custody and taken before the Grigori.
In the anime, the cuckoo clock imprisoning Amaimon was cut in half by Rin, surprising Mephisto and releasing Amaimon, who escaped into the forest. The cracks at the base of Kurikara started to break down and could no longer substain Rin's power and he went berserk, starting a forest fire. His sword rebounded and hit him with a blast toward his classmates. Rin got up, not recognizing his classmates as his allies and Shura and Yukio were forced to fight him. However, Shiemi ran and embraced Rin, in which he recognized her and powered down. Due to his fight with Amaimon, he fainted from exhaustion. He was captured by the new Paladin, Arthur Auguste Angel, for a disciplinary hearing against Mephisto.
===Mephisto Trial arc===
In the manga, Rin is taken before the Grigori and pinned to the floor by Angel’s sword through his ankle. Mephisto, who is on trial, gives a speech inviting the Grigori to make a bet on Rin’s existence as a weapon against Satan. Rin infuriated by how they are all talking like he is a weapon and not a person burst into flame. He yells, "I am not a weapon! I am Rin Okumura and I will be the best exorcist you will ever see." The Grigori decide to agree to Mephisto's bet to a degree and decree that Rin must pass the exorcist exams in 6 months. He will be executed if he fails to do so or loses control of himself. He is put under constant supervision of Shura and Yukio.
In the anime, the Grigori imprison Rin in a large crystal and Mephisto is questioned for his betrayal. Mephisto states he intends to make Rin a weapon for the Vatican against Satan.
The hearing is interrupted by a earthquake by Amaimon, still alive, but wanting to fight Rin once more. Shura and Angel hold him off but are defeated. Amaimon reaches the hearing and grabs a hold of Rin. Soon, his classmates and Yukio (who were fixing Kurikara) arrive and gives the Demon-Slaying Sword to Rin. His demon heart beating within the sword, Rin awakens and quickly slays Amaimon's vessel. Again, he collapses but is able to beat the demon. The Grigori decide Rin will be spared but must pass the Exorcist exam or be executed. Same goes if his flames goes out of control again.
Category:Synopsis