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fandoms-x-reader · 4 months ago

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Teenage! MC

Requested By: @opiopal

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Summary: How the brothers' would act around you if you were a teenager that got sent to the Devildom. The brothers x MC platonically / sibling relationship

Lucifer felt a bit guilty when it came to you. He was the one who was in charge of picking the human for the exchange student program. So, by default, he was the reason you got ripped from your life and brought down to the human world.

He was surprised by how well you had adjusted to life there. You did your best to be respectful, did your homework, and had great manners.

Lucifer dared to say you behaved better than his brothers who were centuries years old.

But, you still had your moments that baffled Lucifer and made him mentally face-palm.

You were in a student council meeting with Lord Diavolo and the others; and, you dared to call Lord Diavolo “dude”.

A collection of gaps broke out across the room when the word left your lips. You called the future King of the Devildom “dude”! You could see some of the brothers - mostly Belphie - stifling their laughter at the situation.

But, Lucifer was completely mortified. His eyes were wide and his expression looked flushed. He couldn’t believe your audacity.

Luckily, Diavolo laughed the whole situation off. He found it amusing.

But that didn’t stop Lucifer from giving you a long lecture on how you were to never do that again.

And the next time you came face-to-face with Diavolo, Lucifer was on high alert, ready to clasp his hand over your mouth every time you said any word that started with the letter ‘D’. Just to make sure that never happened again.

Lucifer was used to being the head of the household and making sure everyone did their daily chores and kept up with their studies.

And you were no exception to that, so Lucifer didn’t think twice about it when he asked you to do a simple chore.

But you woke up on the wrong side of the bed, it was very early in the morning, and you weren’t in the mood. All you wanted was to eat your breakfast in peace. You just wanted a moment of silence before you had to go to school.

“Y/N, you need to clean your bedroom after you get home from RAD today,” Lucifer stated simply, continuing to eat his breakfast. It was a simple request that certainly didn’t warrant a sassy response. But it was the straw that broke the camel’s back and a sassy response is exactly what he got.

You had a stoic expression on your face, barely missing a beat before you replied with, “And you and Lord Diavolo need to kiss already but neither of those things are going to happen so let’s not talk about it at 6 am.”

You hadn’t looked up from your plate yet, but you could imagine the shocked expressions on everyone’s faces. Especially Lucifer’s.

“Well, we’ve gotta get to RAD,” Mammon stated, practically pulling you up from your chair. He had seen that look on Lucifer’s face too many times and he knew exactly what followed afterwards.

The other brothers quickly joined the two of you. Lucifer was not used to being defied and he was most certainly not going to be happy with the way you talked back to him.

The brothers found it amusing nonetheless. A teenager standing up to Lucifer of all people. And you didn’t even have a look of fear in your eyes!

Lucifer loved having you around. You were a welcome addition to the family. But he definitely got the brunt of your witty remarks and side comments.

And he had no idea how to handle it. It’s not like he could punish you like he did his brothers. You would barely survive half of them.

For once in his life Lucifer felt defeated…by a teenager.

Mammon still tries to impress you as a teenager. But not in the same way. He wants to come off as the “cool” brother. The one that will let you stay out later than you’re supposed to, and take you for rides in his car, blasting music.

Mammon loved it. Having you around made him want to be a good role model despite his spending tendencies.

He would still be a bit possessive of you. Only because he doesn’t want his brothers influencing you. Only he was allowed to show you things around the Devildom.

He wanted you to like everything he liked and hate everything he did. Movies? You liked the classic Devildom action movies, right? You didn’t like horror movies, right?!

And you loved going gambling with him, right? Didn’t you think it was so fun watching him win? Of course, he had to lie about your age to get you through the doors of the casino. But that just added to the fun of it.

And please don’t ever mention anything about witches to either of you. You both hated them with a passion. At least, Mammon will say that if someone ever did bring up the “w” word.

The truth is, that Mammon felt guilty about leaving that little girl he had found with the witches. It was for the best that she stayed up there in the human world. But, he couldn’t help but wonder if he would have been able to take care of her himself.

And although you were more like another sibling than a child to Mammon, he wanted the chance to start redeeming himself. For the first time in his life, he wanted to be responsible for someone. Please be his mini-me.

But being responsible meant that sometimes he had to be more assertive than fun. Especially if you were putting yourself in danger.

You didn’t think you were. You thought that going out with Simeon and Solomon would be fine. You were just hanging out around town for a bit before heading back to the House of Lamentation.

But, you forgot to text the brothers that you were with them and when you hadn’t gotten home in time, Mammon snapped.

Worry filled his heart and directed his mind.

When he finally found you in town with Simeon and Solomon, relief came in waves.

He took you back to the House of Lamentation, despite your protests. And, as soon as you were back, Mammon decided to give you a lecture. He had learned how to do it from the best, after all.

“What do ya think you were doing? You almost gave me a heart attack,” Mammon stated as you began walking to your room.

“We were just walking around town. Don’t you trust Solomon and Simeon?” you questioned, crossing your arms over your chest as you stood outside your bedroom door.

“I don’t trust ya out there by yourself without one of us to protect ya,” Mammon countered.

He didn’t mean it to come out the way it did. He was just worried about you. But, you were angry with his words. You were frustrated that he was treating you like a child so you replied with the first thing that came to your mind.

“Your whole thing is being a crow in a flesh suit. I really don’t want to listen to someone who would stop everything that’s happening in their life to pick up something shiny from off the ground.”

You entered your room before he could respond and closed the door on his face. Mammon stood there in shock while Levi and Asmo began snickering in the background. They couldn’t deny the truth in your words.

Mammon was stubborn when he wanted to be and that left the two of you giving each other the silent treatment. Just like he would do with any of his other siblings.

But, eventually, he apologized. Especially when he saw you growing closer to his other brothers in his absence.

Please forgive him. All of his other brothers have told them they wished he wasn’t their brother or part of their family. He can’t handle hearing that from you too.

If you were a teenager who liked going out and doing things on a regular basis, you and Levi probably wouldn’t have a lot in common. And it would be hard to spend time with him.

But, if you were a teenager who liked watching anime and playing video games, you and Levi would be best friends.

He was still wary of you at first. After all, you were a normie. And even if you were a teenage normie, he could never be too careful.

He’ll slowly open up to you though. If you impress him with your own otaku skills, the process will be even faster. Deep down, Levi just wants a friend who likes the same things he likes.

He wanted someone he could talk to. Someone who wouldn’t brush him off or tell them that he wasn’t making any sense.

Levi will invite you over to play games with him often. He enjoys playing with someone who is actually competent.

But even he isn’t safe from how sassy you could be. And if you and Levi played a game against each other, your competitive side came out and so did the sassy comments on both sides.

Levi had heard of a fighting game that was very popular up in the human world and he was dying to try it. He wanted to know how it compared to the fighting games that they have in the Devildom.

Let the trash-talking commence.

You’ll surprise Levi with the first couple of things you say. But he’ll quickly begin to fight back with his own remarks. Both of you fight diligently with both your words and the controllers.

And, when you start winning, Levi’s jealousy starts getting the better of him. He’ll tell you things like “You’re cheating” or “It’s because it’s a game from the human world.”

“Come on, Levi, just admit you’re not as skilled as me in video games,” you retorted. His eyes were now glowing as his fingers were pushing the buttons on the controller rapidly. He had to win.

“I won!” you exclaimed with a proud smile. That smile faltered though when you saw Levi’s expression. A dark aura surrounded him as he stated in a low voice, “I want a rematch.”

“Yeah, and I want a million dollars. But right now I don’t feel like beating an old man who’s lost his reaction time at a videogame…again,” you replied, before getting up and leaving.

Levi let out a small gasp as you left the room. Old man?! I mean, he technically was considering he was at least a few centuries old. But he has not lost his reaction time!! How could you say something so rude to him? He just needed practice, that was all.

Levi will pester you for the next few days, begging you to play with him. He’ll tell you his reaction time is better and that he won’t lose. He won’t give up until you either tell him that you think he’s a great gamer or until he beats you in the game.

Satan will take it upon himself to be the one who helps you with all of your studies. He usually won’t be the one who encourages you to neglect your education in favor of having some fun.

He would rather ensure your success. He wants you to be at the top of the class, with his help. He just wanted the best for you. And he wanted to rub it in Lucifer’s face later.

He’ll always suggest the two of you have tutoring sessions where he can help make sure you understand the lessons that are being taught.

He’ll stay late after class or show up early. He’ll meet you at the library or at the cafe. Wherever you would agree to meet him.

And although you appreciated him trying to help you, sometimes it was a bit much. Especially when it was early in the morning.

Which is exactly when Satan decided to have your latest study session. You were barely awake and hadn’t had any food or coffee yet.

You were sitting at a table, your books opened in front of you as Satan went on a rant about one of the lessons. Your mind was barely keeping up with what he was saying.

All you wanted to do was go back to bed, but Satan’s rant was never-ending as he tried explaining all the intricacies of the subject you were studying.

You finally had enough when you had to catch yourself from falling out of your chair after you had accidentally fallen asleep.

“Okay, Satan, look I love you, but I hardly remember the difference between a verb and a noun so I have no idea what the actual fuck you are saying with your mouth and your face right now,” you stated.

Satan was taken aback at your sudden outburst. His eyes were wide as he suddenly took in your tired look. Normally, he would argue that it’s important to study. But, today he responded with, “We can pick this up later.”

You were thankful that you were finally able to return to your room and Satan was more careful about planning your study sessions. He’ll do his best not to overwhelm you again.

Also, don’t think Satan was only serious around you. Satan had a very playful nature, especially when it came to Lucifer. And you were the perfect vessel for some of his pranks.

Satan knew that Lucifer couldn’t do anything towards you so he would beg you to be part of his pranks that he and Belphie would play on Lucifer. You were an integral part of the Anti-Lucifer league after all.

Sometimes you were bait, luring Lucifer into staying in a specific spot for too long. Sometimes, you were the one who actually set off the prank while Satan or Belphie distracted the eldest.

It hardly ever worked. Lucifer almost always knew what the three of you were up to. But it didn’t stop any of you from trying.

Satan thoroughly enjoyed having you there to help him. He believed you fit in with the family perfectly.

He also related to you the most as you were both considered “late-comers” to the party. Neither of you had been angels, and although you weren’t a demon, Satan still felt like he connected with you.

You never made him feel like you were better than him or like he wasn’t his own person and he was thankful to have a sibling like that.

Asmo thinks you are the most adorable thing in the world. He was the first one to dote on you out of all his brothers. How could he not?

Asmo is very accepting of you from the start and thinks of you as family almost right away.

He’s like Mammon in the sense that he wants to be the one to show you around the Devildom and teach you all the tricks he knows.

He wants to show you how to charm people and get them under your spell. Of course, he has to approve of the person you’re trying to charm and he’ll only let it go so far.

He’s the Avatar of Lust - but NO PDA. You were too young for that and these were demons after all. He didn’t trust a single one of them.

He’ll only let you try your charm on age-appropriate people and only until you have them hooked so that you know how to do it. Then, he’ll charm the person to go away himself.

You better believe he also wanted to dress you up in all of the outfits in the Devildom. He loved taking pictures of you and posting them on Devilgram with captions like “Look at my lovely sibling! Aren’t they cutest?!”

But it could be overwhelming sometimes. The constant shopping trips and photo ops. The constant fashion shows and meeting new people all the time.

Adjusting to the Devildom was a task on its own and there were times when you just needed to be alone and recharge your social battery. Times when you just needed some peace and quiet.

You were trying on the sixth outfit of the night in Asmo’s bedroom. You had asked if you could be done on outfit number three. All you wanted to do was go to your room and relax.

Asmo promised the two of you would be done soon, but you saw no end in sight.

“Only a few more,” Asmo told you, shoving his arms full of clothes.

You let out a groan and Asmo turned to face you. You finally let the words you’d been holding back fly out of your mouth.

“Asmo, I know you’re too glam to give a damn, but I’m not your personal mannequin and all I want to do is lay down and relax!” you shouted, feeling relieved as you finally spoke the truth that was weighing you down.

Asmo isn’t used to you snapping at him like this, so he’ll give you some time to calm down. He doesn’t want to keep pushing your buttons.

Once you start talking to him again, he’ll want to do a spa day with you instead of going shopping. He’ll pay more attention to your needs and he won’t force you into doing anything you don’t want to do.

At the end of the day, Asmo is a very caring sibling and only wants the best for his family.

The first time Beel saw you, he couldn’t help but think about how much you reminded him of Lilith.

It was simple things. Things he noticed just from where he was standing in the assembly hall when you first came to the Devildom.

Your big and innocent eyes. Your gentle and loving smile. You were so full of life, just like she was.

It didn’t take long for Beel to take you under his wing and decide to protect you. He acted like an older sibling and he was always there for you.

If you were upset, he’d find a way to cheer you up. If you were bored, he’d try to entertain you. If you were hungry - he knew just the cure!

When he found out that you had a connection to Lilith, Beel was ecstatic. It wasn’t your connection to Lilith that made Beel love you more. You were your own person and he’d never compare you to his little sister.

It was the fact that your connection to Lilith meant that you truly were part of the family. That you belonged no matter what obstacles stood in the way. It didn’t matter if you were human - he would always think of you as family.

When Belphie attacked you and killed you, Beel really thought he failed. He was plagued with images of Lilith dying. Belphie didn’t understand what he was doing - how Beel felt about you.

He didn’t understand how badly it hurt Beel to watch someone he thought of as a younger sibling die in front of him - again.

When he saw that you were alive he had never felt more relieved. He promised you he would never let anything happen to you again. That he would protect you like any good big brother would.

And he was the perfect older sibling - for the most part.

Lucifer had taken you up to the human world for a task. While you were up there, he allowed you to get whatever you wanted and bring it back down to Devildom.

You shopped around for a bit until you saw a supply of food that you used to eat all of the time. Food that reminded you of your childhood.

You immediately got it and brought it back with you.

You wanted to shower before you ate it because it had been a long day but when you returned to the kitchen, you were heartbroken at the sight in front of you.

Beel had eaten all of it! You didn’t even get to have a single bite of it. You could feel the emotions building up in you. Mostly because of the nostalgia that came with the food.

“Beel,” you stated, pausing for a moment to stabilize your wavering voice. “How could you?” you asked.

Beel looked up innocently from the food, a questioning look. He didn’t have the slightest clue what he did wrong.

“I get that you're a bottomless pit and that you're practically Kirby on steroids. But can't you just for once think about what you're eating before you eat it!” you stated before storming off.

The next day, Beel made sure to get the same food for you and brought it to your room as an apology.

He would do his best to never eat your food without asking again because he realized teenagers could be scary when they were hangry.

Belphie obviously doesn’t have a good first impression of you. You had never done anything to him, he just innately hated you because of the fact that you were human.

He attacked you with no remorse until he saw how it affected his brothers. They were so upset about losing you and he couldn’t comprehend why.

He saw the way they embraced you when they found out you were alive and the scene triggered something in his brain. A memory of someone he loved the same way.

Belphie didn’t attack you again, despite his instincts telling him to do so. He was curious to see what all the fuss was about.

Things between you and Belphie were tense for a while. You knew that he hated you because you were a human. But it’s not like you could do anything about it. There was no way for you to change your race, and even if there was, you wouldn’t do it just to appease Belphie.

Like Beel, the more time he spent around you, the more he saw you as a younger sibling.

He would protect you like an older brother, but he was the least serious out of all the demon brothers.

Your carefree nature was one of the things he adored. He enjoyed watching you be improper in front of Diavolo and the way it made Lucifer look like he was going to pop a blood vessel.

The way you talked back to Lucifer also entertained him. It was something all of the brothers wanted to do at one point or another, but they didn’t have the luxury to do so.

Yet you were just a teenage human and you dared to stand up to the Morningstar himself.

The first time you did it, Belphie immediately deemed you a worthy member of the Anti-Lucifer League.

He had so much fun pranking Lucifer with you and Satan and he was thankful that you had brought him closer to the fourth-eldest.

He never once judged you for your sass or asked you to tone it down. He loved it because he could be just as witty when he wanted to be.

He also never thought that your sass would be directed towards him.

That was until you got caught in the crossfires of one of their pranks.

Satan and Belphie had neglected to tell you that they had placed a cursed object in the living room, expecting Lucifer to pick it up. You found it first though.

The second you touched it, your entire body immediately froze and you were unable to move or speak.

Belphie and Satan came in with proud smiles on their faces until they saw that the person they had cursed was you.

They immediately rushed to your aid and Satan began saying spell after spell to try and undo the magic.

Lucifer had entered the scene at some point and was holding back his scolding until after Satan had remedied the situation.

As soon as you were free you turned to all three men and stated, “I know this was your idea, Belphegor. I’ve had it with all the pranks. They’re silly, they take a ton of time to prepare and they never even actually hit Lucifer! It always fails or hits whoever else happens to fall for it.”

“Satan, I know that you don’t like Lucifer because you were born from him, but the only one who actually makes a big deal out of it is you! And Belphie, you are the youngest brother! Everyone dotes on you so stop acting like Carrie at the prom because you fit in just fine. And Lucifer, for the love of all things would it kill you to tell your brothers that you love them at least once in a while so that I don’t have to suffer through pranks like these anymore!”

At some point, your rant had attracted the other members of the House of Lamentation who were all looking at you with wide eyes.

You were a sassy human, but you were their human. You were part of their family and you did fit right in. They were proud to call you their human.

Especially Belphie who was somewhat glad that not even he was safe from your rants when you had been pushed to your limit.

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