AU-Fiction. Izuku holds both All for One, and One for All. Yet despite his incredible potential, he has work twice as hard to make both quirks his own power. Not to mention the troubles and challenges he must face with his new quirks- "Uraraka-san, please! Teach me how your quirk works!"

Satan has never tried to grow or nurture anything in his life before, but for the sake of the only person who was ever precious to him, he's willing to try just once. In a bold move that no one could have predicted, Satan possesses the body of a stillborn Rin and does his very best to raise Yukio. He's actually quite good at it, demonic tendencies and hyper-possessiveness aside.

AU Seven year old Yukio swore to protect his younger brother Rin when he was born. Eight years pass and he's kept that promise ever since. He works to keep Rin safe from demons as an exorcist but that turns into a challenge when the seal on the sword that the young half-demon's powers were sealed in weakens. (Full summary inside)

AU. When Rin was six years old, he got into trouble at school. Fearing the disappointment of his father, he did not walk home with Yukio; instead, he took a left turn-and future events started to shift. Rated T for safety.

Rin is taken away to Gehenna when he is a baby. Unfortunately, they can't obtain Kurikara. The young prince gets raised as a human by Satan and fifteen years later he has to go back and get his demon heart, so he can gain his demonic powers and become the worthy son of Satan.

(AU-ish) What if his flames had not forced their way out as quickly as they had? The day he found out he was Satan's son was also the day he lost his sight. Now all he could see was darkness and flaming silhouettes.

A collection of Blue Exorcist shorts. No pairings. Latest: After his whirlwind tour of the past, Rin wanted to collapse in bed for a week. He almost made it to his dorm when Eyebrows found him. "Moriyama!" she panted. "They took her!"

What happens when you put a big mind in a small box? A tiger in a cage with lambs? A demon in a room full of exwires? Lucifer wants to find out. Boredom is a demons constant companion, but even Mephisto can only take so much. How long before the demon loses it? A game of wills, wits, and psychological pressure has begun. In the game of chess, only one king can win. Checkmate.

Izuku has been captured and needs to try to appease his captor if he wants to live, she just wants to make him perfect. (Himiko Toga has poor Deku in her clutches) Warning: Fic contains descriptions of torture, gore and general unpleasantness. Also this fic is set after they have recieved their provisional hero licenses so there may be spoilers as well.

There were certain things you could say about Mamushi Houjou. Mamushi Houjou was scary. Mamushi Houjou was cold. And most importantly, Mamushi Houjou definitely, without a doubt, could not stand one Juuzou Shima. However, there have been several instances where these statements were proven to be incorrect. Even the most important one. Especially the most important one.

Mephisto finalized his plan of sixteen years by trading Rin to Satan for his freedom, but things quickly fell apart. Now Yukio must find a way to rescue Rin from Gehenna, and Rin has to stay alive as he's trained to be the Prince of Hell - but what if he forms an alliance and decides to overthrow Satan's rule instead? -some chapters are rated M b/c of gore in some chapters

After going berserk at the exorcist training camp, Rin was sentenced to death and executed. Three years later, his friends have moved on and are now living their own lives as graduating exorcists. When an Arc Knight is killed in battle, foul-play is suspected. A figure from the past resurfaces, rising to claim their rightful place among the elite.

Rin lost control at the exorcist training camp, his father is dead, and he lost the friendship and trust of those closest to him. How does one carry guilt, face the consequences of past actions, and keep yourself from falling into despair and drowning? Seeking an escape from reality, Rin turns to the last thing anyone expected. CURRENTLY BEING EDITED

After Rin lost control during the exorcist camping trip, the other exorcists feared, insulted, and cursed him while only seeing him as a monster. Soon after, Rin disappears without a trace. 2 years later, he returns not as a friend, but as a cold, changed new recruit for the academy. Eventual Rin x Izumo/ A little Yukio x Shiemi. [Abandoned]

Huge patches of his vision whited out when he stood. A ringing began in his ears, as loud as that time back in primary school when a classmate had swung a cricket bat into the side of his head. Something solid slammed against the more vulnerable flesh of his temple and with a startling lack of transition, Rin's vision went from white to black without him realizing. sick!fic

Living the life of a demon comes with a lot of banes and boons, but it can be pretty handy when you have some extra features. Rated Teen because I'll probably curse a lot and there will be mentions of gore. *Don't be fooled; lots of angst, /plenty/ of whump, as well as humor and friendship/family. :)

In the midst of the barrier's fall and the Gate's growth, Rin reveals the will to protect what's dearest to him by pushing his limits and doing what it takes to achieve it. Yukio, on the cusp of something far greater and pinned between the Order and the Illuminati, must make a decision, and unfortunately, it seems Rin has dragged everyone along with him. [Massive Manga Spoilers]

Sequel to "charges of the Flame Alchemist". After becoming a state alchemist Rin is discovering more and more that there is a great evil lying in wait just below the city of central. But what might this power be? And what are its plans for him and Yukio? Set mostly in brotherhood timeline with some aspects taken from earlier episodes of 2003.

Rin Okumura, the son of Satan, believed not much was going to get worse. Of course, he knew the demon side of his life would be worse but he never expected his human side. His past was catching up to him. Now, with a rotten human showing up and then an accident that leaves him disabled, what will he do? After all, more of his secrets will be revealed.

Izuku wasn't Quirkless when he received One For All. Of course, it's just typical he didn't find out until Yuuei. It helps that everyone likes his singing voice but less helpful when Bakugou calls him Rapunzel a la Tangled. Slight AU where Izuku can heal others if he hums or sings to them. Oh, and everyone thinks he's the most precious thing ever, as if they hadn't already. OOC.

Hisashi Midoriya, or more notably "All For One" has made a terrible mistake in his plan for One For All's eventual descent. He let his emotions get in the way of his goal. Now he tries to gain back what he has lost to the light. His son. Izuku Midoriya. (All for One Izuku)

Despite what the rumors say about their homeroom teacher, Class 1-A knows that Aizawa-sensei is actually a softie.

It all started with good intentions, when the Okumura twins got the crazy idea to switch places one day. Blame it on a bad haircut and extra pairs of glasses. How far will they go before someone finally says something? (Timeline wise, this takes place after the Illuminati arc /mangaverse - Yukio has both functioning arms.)

After a mission goes sour, Rin tries to take care of his resentful but injured younger brother. Spoilers for chapter 96.

Gehenna and Assiah have always been described as mirror dimensions. And what is a twin but the reflection of the other twin?

Renzou attempts to find Yukio on the Dominis Liminis. Spoilers for chapter 97.

"My, my, this is really extraordinary," Mephisto commented. "Never thought Father's heritage would resurface again." Blue flames, tail, and sharp teeth against Grace, halo and wings. Because some say that Satan once was an angel of Heaven so the idea that one of his children might inherit his Grace isn't far from impossible. Nephilim!Yukio. Full summary inside!

A "What if Izuku's father, Hisashi Midoriya, is All for One?" theory fanfic. How would everyone react, especially Izuku himself? Takes place in their 1st year overlooking Season 3/manga events, so canon divergence. Season 1 and 2 anime spoilers only. Disclaimer: I do not own My Hero Academia or any of the characters. *cross-posted on AO3*

In which secrets and lies revolve around the family. One for protection, the other for ignorance and perhaps a bit of a vendetta.

Izuku has an amazing quirk, and it was very strong, some may describe it as overpowered. Unfortunately, it has come with a price. The manifestation of his quirk has left him with a scar that will stay for a very long time. A bit OOC!Katsuki – well you'll understand why. Quirk!Izuku. It's basically me wanting more mob psycho 100 anime, but I wrote this instead. Kacchan curses a lot.

Basically my take on what happened after chapter 93. Rin blamed himself over what happened. The damage is done. It feels like their relationship will never be the same, but Rin desperately cling to whatever shards and pieces he can find and try his best to mend it. But he didn't know that this will trigger a bigger issue. Warning: Suicide themes, bloody in general

"Lets make a deal, I'll give you a year. Your friends live. And I get to drag you to hell myself." Rin looked at the demon wide eyed, then to his friends. He reached out his hand. "Deal."- "What is wrong with you? Making deals with demons. working with angels. Do you have any idea how big of a hole your in Rin? And all this behind your friend's backs? Why?"

Sequel to Midori the Girlfriend. With her emotions unstable but her mind focused on her goal Izumi Midoriya refuses all romantic connections to pursue her dream, but after a tragic accident during hero work she wakes up in a reality she doesn't recognize.

Sequel to my story "Crutch". Just when Yukio is getting used to having demon flames, his world changes again.

Sequel to Midori the Girlfriend. The Bakugo Arc

He's always seen the strange, horrific looking creatures for as long as he could remember. Feelings of déjà vu always come and go. And he just doesn't know why. Or at least he didn't, until he came to True Cross Academy on a Student exchange programme. [Sequel to Trust]

(Post-Kyoto) Rin is struck with an unknown disease straight after defeating the Impure King. This could be just seen as a last minute fever, but a plague crawls closer to True Cross. (Co-written with Faisalliot!)

In which Bakugou Katsuki pisses off a young man so much that next thing you know Midoriya is taking care of him… as a child! Child!Bakugou and Babysitter!Midoriya along with class 1-A and special appearances from class 1-B!

(AU) One-shot. Based off of Protect You, Always. At five years old Rin wanted to cook. Shiro decides to let the boy make dinner, but Yukio is worried about his brother's safety in the kitchen. Turns out, Rin had a natural gift in cooking.

Things aren't going too well for Rin, and it's about to get a lot worse... Based on the early chapters of the manga from after Rin's identity is relieved. Can be read without prior knowledge.

Seven-year-old Rin only wanted to escape. In the process of doing so, he finds out he has the ability to summon blue fire. But when he is approached by a stranger claiming to want to take him home, what does he do?

Various (mostly comedic) ways of exposing Rin's demonic secret. Post a review containing an idea for a reveal and it may get featured!

"It cannot be forcefully taken, but it can be forcefully given away." Midoriya Izuku had been warned that if someone were to find out about the nature of his quirk they might try to take it away from him. It still wasn't enough to prepare him for the day someone would actually try it.

Rin knew what it felt like to be betrayed and he was used to it by now, he just wasn't used to it hurting this much—why did it have to hurt so much? Set after the Camping Trip Arc. Not your common cliche. [AS]

AU. Shiemi Moriyama, a young Flower Priestess stricken by misfortune, falls in a forbidden love with the exorcist brought at her bedside in the dead of night. But Rin Okumura has a ring on his finger and secrets darker than any Flower Priestess could imagine. Disclaimer: I don't own anything

"Don't feel bad for not picking up the phone, Mom. There's- there's been an accident…" Midoriya Inko receives a voicemail. Yagi Toshinori a very disturbing phone call. Midoriya Izuku doesn't know which one was worse but he was glad he could hear at least one comforting voice right then.

The night Rin awakened was also the night he ran away after being told the truth and somehow ends up hiding from everyone and everything he had ever known. What better place to disappear and forget his old life than in the land of Inari and Fox Alley where he lands a job as the new groundskeeper for the Old Inari Shrine.

When the people Rin cares about the most leave him, he resorts back to old habits: cutting. When his friends all find out, how will they react? Will they try to help him, or just let him go further down a path that eventually leads to suicide?

During the battle of the USJ, Izuku is hit and seriously injured by the anti-All Might, Nomu. When All Might arrives, he's beyond furious. (Read the full story on AO3) (Dad Might)

Rin had an extremely tiring day fighting swarms of demons without being allowed to use his flames. well enough is enough. finally he draws his sword and throws his sheathe down on the ground in irritation. He'll find that was the wrong choice when later he goes to sheathe his sword and- wait. Where did his sheathe go?

Izuku gets hit by a Villain with a Scorpion Quirk, leaving him in a nightmare induced coma. His friends struggle to save him, and accidentally find the side-effect of the Quirk: allowing others to see Izuku's memories before UA. Deals with bullying and depression. Contains hurt Izuku, friends working together as a team, and some family bonding. Hinted IzuOcha, but not much.

An AU in which Midoriya Izuku inherited his mom's quirk; has a very, very weak constitution; and studies in the Support Course of UA Academy. A story also featuring an overprotective Bakugou Katsuki.

(AU-ish) Rin and Yukio are asked by four unknown exorcists to help them catch a demon that apparently is as powerful as Satan. They agree, but what secrets are they hiding and what secrets does the demon hide. Why go after him when he has done nothing wrong? Also, something dark is growing, and it won't be long before it comes after their icy demon.

At a young age, Rin is diagnosed with a terminal illness. / Rating will probably go up in the future due to graphic content.

The battle with The Impure King leaves Rin in an extremely wounded state. But, as he recovers, a small group of the exorcist society are hatching a plan to kill Satan, and Rin is the key component in their strategy - and they don't care whether or not it kills him in the process...

As an Exorcist, it only seems natural to pick up an injury or two while fighting demons. This is a series of one-shots in which a party members is ill or physically injured, and the others do their best to help them.

This is an omake from my other fic titled 'Fraternal Twins are Still Twins' (but it can be read as a standalone one-shot, no worries) Shima was left alone in Okumura's dorm after falling asleep during their 'homework marathon session'. He found out that it's fun to tease both of these twins and claimed the big brother title. Rated T for a little 'boys talk'.

Take away their different hairstyle, different height, Yukio's stupid glasses, and Yukio's stupid moles and they will be the same person, right? They are twins, after all! - A story where Shima teases Rin for not being very twin-like with the young Sensei and Rin is determined to prove that Shima is wrong.

When Shura dragged Yukio from his dorm room one snowy night, she also dragged the truth out of him. The barrier of secrets and lies he had woven around his heart unraveled just in time, for the Illuminati's plan is starting to fall into place. Yukio may be ready to start down a new path, but the fate set up for him sixteen years ago won't let go that easily. Manga canon

Summary Rin is kidnapped and tortured for four weeks, before he is saved by his guilt ridden brother and the others. How will both of them react to the guilt from their fight? They will have to decide fast, because the man who tortured Rin is back for more

"Ah, I guess you could say I'm your older brother. Nice to meet you. From now on, please call me 'Amai-nii.'" Rin meets his first demon when he is seven years old.

Rin's been having bullying problems lately, and things become much worse when said bullies start getting violent. Normally, he would take them on, but for Yukio's sake, he decides against it. The last thing he expected however, was an intervention from his demonic, and surprisingly overprotective older brothers. Follow the chronicles of a boy and his demonic family.

After defeating a rather powerful demon known as the Impure King and finally accepting who he really is, Rin encounters a complicated obstacle. What obstacle is that and how will Rin get past it? Now featuring Evilneko101 as coauthor.

"Are you okay, Rin? You're not acting like yourself. What's wrong?" Rin started rubbing his eyes again. Yukio noticed this was becoming a daily trend for his brother. He'd seen his older twin rub his eyes a lot during the day either in the dorm or in class. He had the sneaking suspicion that something was bothering his brother's eyes. Had he ever gotten them checked out?

Rin Okumura had been doing fine in terms of friends, in terms of school, in terms of his steady pace in the art of Exorcism... but all that changes when something goes wrong during a seemingly simple mission, causing him to crash and burn among his own flames, so to speak. WARNING: There is drug use and self harm/depression themes in this story, full warning inside BEING REWRITTEN.

When Rin's powers start revealing themselves at a much younger age, Shiro has no choice to send him and his brother somewhere else for their own protection: a place without demons or exorcists where an unlikely man who owes Shiro his life lives.

Little moments from the Okumura brothers childhood, when they spent time with their Father, to their teens, when they arrived at the academy with their two older brothers, Mephisto and Amaimon.

Dragged to Gehenna when he's 10, Rin misses out a lot on his old world. But, after spending six years of his life there, Rin has no intention of returning to Assiah or becoming Satan's vessel. But Yukio has other plans, and Satan is hell-bent on subduing his youngest son.

IS BEING CONTINUED :) This takes place after the Kyoto arc. Some Okumura-cest. Rin goes to get a mental evalution as an order of the vatican but somehow Yukio becomes the main patient. Mentions of Chapter 32 and onward, spoiler alert! slight gore/twincest/hurt/comfort some cursing.

After being revealed as a demon to every one of his friends, during Rin's trial in front of the Grigori, a different fate shall be set in store for him. One where he forgets everything that was once important to him. (This is my very first story! Oh my gosh, I'm so nervous. I'm grateful for anyone who takes their time to read this. Thank-you! Set right after the camping trip :D)

Yukio knew this was a bad idea. It was all Mephisto fault, and his to. He should of never agreed to let Rin take the mission. Takes place before Yukio's power is awaken.

"Did you say worm?" Rin asked. Yukio's explanation had some other heavy stuff, but Rin browsed over it selectively. "I have worms?"

Rin is left, hurt or sick, with the very power he uses to save him now fighting against him. Yukio and the others have to find some way to help him before the flames and maybe some mysterious illness take his brother from him.

Yukio overhears something disturbing in his dorm room. What will he find inside? Pure randomness, contains mutilation of innocent sweets

AU. Ryuji Suguro was angered by his classmate, Rin Okumura's, seemingly aloof regard for class. Especially since he worked so hard to get high marks. For this reason, he makes it his mission to get Okumura to take school seriously. What Ryuji finds out about the other boy is shocking, yet makes perfect sense. Shounen-Ai, BonxRin

Rin's been acting strange lately. All he wants to do is sleep. An argument with Yukio pushes Rin to his limits and he finds himself resorting to the unthinkable. Now just a oneshot, sorry!

I used to think having six brothers was bad; Amaimon alone is almost too much to handle. Now all of a sudden, that number's gone up to eight, and I'll be lucky if I can finish senior year without going insane. - - A look at how things might have been if the sons of Satan were a "normal" family (AU).

When a mission calls for the Exorcists to deal with a Yuki-Onna that dumped an entire winter on a small region, Yukio notices that Rin seems to be rather subdued lately, despite his success at being an exorcist; lack of proper promotion notwithstanding. Meanwhile, Rin finds out that this "Yuki-Onna" thing is not as clear as people believe... minor future fic spoilers

Rin had been trapped in his own mind for four months. Not being able to do a thing about it. When he awakens, he finds that his whole life of being an exorcist was a figment of his imagination. How will he react, or cope with the situation? Update on the first of every month!

Rin's and Izumo's relationship was an odd one that confused the group around them and themselves. Despite that they both decided to make happy memories

Being both a demon and a human, Rin has the strengths of both. He also has the weaknesses.

When a lonely little boy finds a sword that can talk to him, his entire fate changes. A sword that loves humans finds a half-demon child and decides to join with him. Things won't be quite the same for anyone, but is it a curse or a blessing? Crossover with Durarara.

The people closest to you keep the most secrets. eventual Yukio/Rin

Warning YAOI: "What could you possibly be good for brother? I just don't get it." Rin coughed up blood as he desperately gasped for air. "I can't tell. Do I maybe have you cut you open?" His eyes grew wide with horror as he watched the Earth Demon King slowly draw forth his stolen katana.

Rin is kidnapped, Yukio's working himself too hard. Satan has a plan that doesn't make sense, and Mephisto's just an asshole. Yukio/Rin takes place directly after the anime

Don't you wish for Blue Exorcist to be funnier? What are you shaking your heads no for? Of course you do! Get ready to see every episode taken from the popular Anime series and given a comedic face-lift for your amusement! Enjoy! Read and review, please!

A mysterious little girl appeared and is looking for her parents. And recognized them as Rin and Yukio. A fic wherein Rin is mommy and Yukio is daddy. ugly summary but please read, it's better than how I described it

Post-anime. Rin helps Yukio adapt to his newfound strength.

Amaimon begins to feel jealous of how Rin cares for Yukio and demands the same treatment. They are technically brothers, after all.

"You can do whatever you wish with me until you're satisfied. But in return, you'll never drag other people in this!" Neuhaus hatred for Satan's son Okumura Rin drives him into doing horrible things to the boy. Until he grows to love him. Rape, violence.

No one had known a problem quite like this would arise. Of course the Son of Satan would be every demon-girl's dream come true. But Yukio will give everything so Rin remained ignorant, everything to keep him away from those banshees, those... fangirls.

The Okumura twins are more similar than you think. / Brother-bonding.