--Mine-- Yandere!Mikasa x Eren x Fem!Reader

WARNING: Trigger warnings for abuse, obsessive relationships, violence, and grotesque imagery. Please note, there will be foul language involved as well.



{Author’s Note: I wrote something for Valentine’s Day~ Not what you expected though, right?

Basically, there will be a love triangle going on. Mikasa loves Eren. Reader-chan sees Mikasa as a friend. But, much to Mikasa’s displeasure, Eren and Reader-chan have romantic feelings for each other, which is what triggers Mikasa’s hatred towards Reader-chan. Poor, poor Reader-chan. D: Without further ado, let’s begin~ I wouldn’t want to spoil the story. ;D

Note, this will be in Mikasa’s point of view.}











--Mine-- Yandere!Mikasa x Eren x Reader





It is all your fault.



The only reason you are trapped here against your will is because you didn’t want to listen to me. You went out of your way to get close to Eren, so now, you are stuck here. No matter what you do or say, it won’t help you escape. I am not charmed by your appearance like Eren is. On the contrary, looking at you disgusts me.



You desperately try to cry help, but your voice is muffled by my hand. We can’t let anyone find you, especially Eren. In desperation, you try to shake yourself free, but nothing works out for you.



“Pathetic...” you hear me mutter.



You look at me, and tears pour from your eyes. Those eyes of yours are pleading to be free. You make me sick. I am not a person you can get favors from with a mere look. No... You have to pay for what you have done.



I hear you muffling against my mouth, trying to get me to listen to you. You sound like a dog. My boot strikes your face, as I kick you, making you yelp. I kneel before you, and pull you by the hair, forcing you to look at me.



“You yell like the bitch you are,” I hiss at you.



You cough, trying to catch the breath you lost. After you’re done, you stare at me with tear-filled eyes.



“Mikasa... Why?” you ask.



I make sure to pull on your hair as hard as I can. “I don’t know [First], why don’t you tell me about your mistake?”



You give me a perplexed look. “I... I don’t know... W-what did I do wrong?”



I make sure you feel pain, as I claw my fingers into your skull. “Do you want me to refresh your memory [First]? Do you honestly not remember what your first mistake was?”



You shake your head no, making sure you don’t cause yourself any more physical pain in my grip.



I pull your face closer to mine, and I bore my stare into yours. “What did you do on the first afternoon we arrived?”



“I... sat at your table?” you answer, sounding unsure.



“Yes, but next to whom?”



You are silent at first, and avoid my gaze, but soon, you answer. “...Eren...”



I throw your head against the tree, and rise back to my feet. I need to resist to smash your head into the tree multiple times. First, I need to talk to you. Those stupid memories of Eren and you keep on flooding into my head. I want to forget any of that every happened. Why do I remember the times you and Eren spent together?





---





“Um... do you guys mind if I sit here?” you asked, giving us a sheepish smile.



You were looking at all three of us, Armin, Eren, and I, asking for permission to sit with us. The other tables quickly became occupied with other trainees. There was barely any room for anyone to sit anywhere, but with us.



I didn’t reply to your question, thinking nothing about you. I thought of you as another person, nothing more.



What surprised me is when Eren answered you with a welcoming grin on his face. He never really was one to converse to others, but, why then, was he inviting you with so much bliss? He is nice to others, but not this nice. ...Why?



And there you are, sitting down, next to Eren, as if you belonged here. You barely know us, yet you sit down as if you were also our childhood friend. Don’t make yourself comfortable. This is only for today.



That wasn’t the case though... Every single day, you brought your tray of food. Every single day, you sat at our table. Every single day, you sat right next to Eren. There was plenty of room by Armin. Why didn’t you sat next to him? Why did you insist on sitting by Eren every day? You are his comrade, nothing more. Me, I’m his only family left. I am important to him.



You don’t seem to pay attention to my glares. You are so dim-witted. Well, I suppose I will let you sit next to him, as long as I am able too, as well. Don’t you dare and try to get chummy with Eren though. You are only allowed to sit at our table, and nothing more.



...



You still don’t get the message, do you? Every morning, you run ahead of me to greet Eren with the irritating smile of yours. By the time I catch up to you and Eren, you are both having a friendly conversation... And me? I’m walking along behind the both of you. I’m the third wheel. That’s not right. I’m supposed to be the one next to Eren. You, are supposed to be the one trailing behind us, feeling awkward. Not me.



It infuriates me seeing Eren smiling so brightly at you. His gaze is always on you. I need to get rid of you. I need to annihilate you. I will get that little throat of yours in my hands, and squeeze the air of of your lungs.



...



...Wait.



Why am I becoming so violent?



Oh well. That is not a problem. You, on the other hand, are a great problem.



---



A few days later, Eren, you, and I were grouped up as a sparring trio. There being an odd number of trainees in our training regiment, there is always a group of three. ...And we were the lucky three.



The first to spar were Eren and you. This was something I wanted to see. I want to see you running away once Eren hurts. He isn’t the kind to hold back against anyone. He has a goal set, so I’ll help him achieve that goal, even if he has to injure other comrades to make it come true.



...The problem was, things weren’t going as planned.



Eren was going easy towards you. He always let you attack first. He rarely threw any punches towards you. He would laugh when you failed to hit him, and called you “cute” at times... He was giving you the smiles he would give me... This is not right. Why is Eren being so kind to you?



I watch in pure rage. You get Eren in your grip, twisting his arm behind his back, and throwing him to the ground.



No. What are you doing? You do not hurt Eren.



I push you off of him, taking the wooden dagger from your grasp, and take your arm, twisting it as much as I can behind your back. Whimpering, you struggle to break free.



“Wait... Mikasa!” you start calling out.



No, I’m not going to wait.



A cloud of dirt drifts to the air as I push you to the ground, face-forward, and get on top of you, putting the wooden dagger towards your neck. Each of my legs are on either side of you, pinning you down.  Slowly, I push the dagger closer to your neck. You start coughing. I see your eyes start watering.



Good, I hope you can’t breath. I want to take away your life slowly, just like you have slowly taken Eren away from me.



Your mouth moves as you try to say something. Your fingers wrap around my hands, trying to pry the dagger away from your throat. I push onto your throat tighter.



Soon, I hear a voice call out my name. “Mikasa!! What are you doing?!”



Don’t you see I’m trying to kill off this little brat. Can’t you see her breath slowly leaving her body? Her eyes are watering so much.



“Mikasa! Stop!!”



No, I won’t stop. I will kill this fucking pest. I feel so happy seeing her struggle so much.



“Dammit Mikasa! What the hell are you doing?!”



Eren takes the dagger away from my grasp, and throws it off to the side. He tightly grabs my arm and pulls me up to my feet. Eren gives me a slight glare, and then turns to you.



He offers you a hand up.



“[First]... Are you okay?” he asks sweetly.



No. Eren... Why aren’t you asking me?



You take his hand, and he gently pulls you to your feet. You dust yourself off. You give Eren a sad smile.



“I’ll be fine,” you answer.



Eren approaches you, and carefully inspects you. “Are you sure? You don’t need to go to the infirmary? I’ll help you go to the infirmary, if you need assistance.”



You shake your head. “No, I’m fine Eren! I promise!”



There you go again, giving him that sickening smile of yours.



Eren quickly turns to me, and scowls. “I still think you should go to the infirmary [First].”



You two keep conversing. Again, I’m the third wheel. This makes me sick. I should have ended your life as quickly as possible. You wouldn’t be standing there. You wouldn’t be able to take Eren away from me. I would have Eren all to myself.



I turn away from you too, and walk back to the barracks. I don’t want to see anymore of this.



I hear boots crunching against the dirt, following after me. Is it Eren? Surely it is Eren. Eren always worries about me, as I do him. I turn with a slight smile on my face, but it quickly fades away. I’m face-to-face with a girl I don’t want to see ever in my life.



“Mikasa?” you get closer to me. “Where are you going?”



“We’re finished training.” That’s all you need to know. I don’t want to look at you any longer.



You look at me, confused. “But, if Shadis catches yo-”



“We’re finished training.” I repeat.



You stare at me wide-eyed as a deer. After giving you a glare, I turn away, and walk back to the barracks. I need to figure out a way to get rid of you. You are ruining everything. I don’t want to deal with you anymore, [First].



...



Three months have passed, but no progress has been made. You are still alive. I have attempted injuring you in every way possible, but nothing seems to happen. Eren always comes to your rescue. This greatly infuriates me.



No one seems to suspect the “accidents” to be caused by someone in the regiment. I’m still safe. That means I can do anything to you, and I won’t ever get caught. I need to annihilate you soon though. Eren and you seem to be getting to close to each other.



You and Eren always chat during free time, you two are always sitting together, and you always help each other. I do not like where any of this is going. You can’t take Eren away from me. He isn’t important to you as he is to me. I need Eren besides me at all times. I need to watch and know his every move. Eren is mine and only mine.



...



Days later, the bell above rings, signaling all of the trainees must head to their barracks to prepare for bed. Eren has been gone for a while, and I am worried. Especially since you are nowhere to be found.



“Mikasa,” a voice calls out to me.



I turn to the source, and face Armin. “Yes?”



Armin stares at me. His expression looks... sympathetic. He avoids my gaze for a while, and his eyebrows are furrowed. Armin sighs, and looks at me in the eye. “You should head to bed, alright?”



I tilt my head to the side, confused. “I am going to go look for Eren. He hasn’t returned and I’m worried... Do you know where he is?”



“He’sintherestroom!” Armin quickly answers. “Yeah... He’s in the restroom. I think he will take a while since he said his stomach hurt. Maybe he ate something bad. I’ll tell him you were asked about him.”



I nod. “Please, and thank you Armin.”



I turn away from Armin, and walk towards the exit of the cafeteria. I hear feet shuffling behind me, and Armin speaks out again, but with a a dark tone in his voice.



“Mikasa, some things, you have to learn to accept, no matter how horrible they are... So, don’t do anything reckless.”



I quickly turn to Armin. His hands are in tight fists. His gaze is towards the floor, and again, he is avoiding my line of sight. Armin gulps, and walks past me, towards the door. He stops again, and sighs.



“In advance, I’m sorry,” Armin mutters, sounding regretful.



I don’t understand what he’s talking about... Why is he speaking this way? Did something happen?



Armin sprints away from the door, and keeps on walking back to the boys’ barracks. He doesn’t glance at me again, nor does he slow down.



I am utterly confused on what Armin meant... What is he sorry for? I don’t think he did anything wrong... He is a friend I can always trust. I can tell Armin anything, and he always helps me out.



I give out a melancholy sigh. Nothing left to do, but go to the barracks. I’ll be in trouble if I’m caught out here.



As I am about to step outside of the cafeteria building, I hear voices muttering, and feet shuffling against the dirt outside. I decide to stay in the shadows of the cafeteria building. Right now, I am not interested in talking with anyone at the moment. There is too much in my mind.



I see two shadows advance to the front of the cafeteria building. It appears to be a male and a female, and they are holding hands. If I made myself seen right now, I could disturb them. I wouldn’t want someone to interrupt me with Eren...



“...Anyway, see you tomorrow Eren!” a cheery voice spoke.



“Eren?!” I whisper to myself.



I peek outside, and stare at the two figures intently. It’s them... It’s Eren, with [First]! What are they doing together?! No... No. Nononono. This it not right. I will not let this happen.



The two figures give each other their good-byes, and depart from each other. I step out of the cafeteria and bare my gaze onto [First]’s back. You are not taking Eren away from me. I will fucking rip you to shreds.



I am not sure when you two started holding hands. I don’t know when you two began conversing every day. I am sure about one thing; tomorrow is your last day living. I will make sure you never look at Eren every again. I will make sure you do not lay a single finger on Eren.



Eren belongs to me.



---



Another day of training.



I stand on top of a tree branch, staring at the flying figures. Many have come up to me, concern as to why I am alone. I simply brush their questions away. I don’t want what I have planned to become ruined.



I glance up when I feel a drop fall on my shoulder. The clouds overhead are dark and grey. They look heavy, ready to pour water over us at the moment. Not like that is a problem. We tend to train during rain anyway.



Sighing, I tightly grip the handles of my gear. I send out a wire towards the tree ahead of me, and swing above the others, observing every single figure flying. I can’t seem to find the person I need to get rid of.



She should be alone at this moment. Everyone is occupied with Eren asking him many questions concerning [First]. As much as I want to interrupt their conversation so everyone knows that only me and Eren are meant to be, I won’t. I need to take care of someone else.



Heavy rain starts to pour down. I accelerate. I need to find her today. I promise I would get rid of her today, so I will.



It takes a while before I find her. She is surrounded by a group, so I follow them, flying below them. The rain starts coming down a lot quicker, and thunder roads loudly. Lightning starts flashing overhead, lighting up the dark sky.



We hear someone yell, signaling training to be over early today. We aren’t allowed to use the 3D Maneuvering Gear during thunderstorms, since there is danger of the gear, and us, being struck by lightning.



Everyone speeds through the forest, not concerned about their companions, but for themselves. I am about to rush, just like the others, but I notice you standing on a tree branch. I approach you slowly, wondering why you are standing there. I can hear you clicking on the handles of your gears, and the whirring noise it makes. It doesn’t seem to want to work. You silently curse to yourself, and look around frantically, hoping to find someone. Your gaze lands on me. You have a bright smile on your face.



“Mikasa!” You wave at me. “Can you help me out? It looks like I won’t be able to go anywhere with my gear.”



I smirk sinisterly underneath my scarf, and approach you. I will be glad to “help” you, especially since no one else is around.



I land on the same tree branch as you, and peer down at you.



“So, do you think you can get me down from here?” you ask.



“I’ll be glad to [First]. Absolutely glad,” I respond.



“Really?! That’s great!!” you exclaim. “I’m sorry to trouble you though.”



“No, it’s not any trouble.” I extend my hands towards you, and give you a push.



I laugh at how quickly your smile fades, and it’s replaced with a look of grief and fright. You fall to the ground below with a loud crack. I peer down at you, and giggle to myself. You had fallen on your hand, and it’s bent in an uncomfortable position. Well, uncomfortable for you.



I hook a wire to a branch, and gently set myself on the ground below. You are crying so much from the pain, and squirm as you sit yourself up. You look at me with so much fear. I notice you want to say something, but I shut you up with my hand.



“Shh. We can’t have anyone find you here, now can we?” I whisper.



---



Now, here we are. You crying on the dirt, and me standing high and mighty. I feel absolute great making you feel so much pain.



“Now do you realize what you had done?” I ask you. “That simple mistake caused all of this. You would be able to live if you weren’t trying to take Eren away from me.”



“B-but, Mikasa,” you want to protest. “I didn’t want to cause you pain! I seriously didn’t know this hurt you! Please, I’ll forgive you!!”



“It’s too late. Eren looks at you, and only you. He never looks at me anymore!!” I start yelling at you. “Do you know how fucking disgusting it is looking at you two?! You two aren’t meant to be! Eren and I are supposed to be together!!! We have known each other for years!!! You deserve to suffer as much as I have!!!”



With your unbroken hand, you try to rise to your feet. I stop you, kicking your broken hand, making you shriek with pain. I take the handle of your gear, and insert one of your blades on it.



I want to be with Eren together. I can’t be caught. I need to make it look like an accident because you are so stupid. Yes, that is what everyone is going to think. Then Eren will be for me, and no one else will interfere. I will finally be happy.



I observe you, wondering where I need to slice you. I could take your eyes out, or I could make you lose your other arm... How about your lips? Or maybe... your whole face. I just can’t seem to decide. Time is running short though, so I need to decide quickly. People will wonder where we are.



“Now then [First]... we should get this over with quickly...” I snicker. “I should cut you in one spot, but where is the correct place?”



---



It’s been a month since your “accident.” I had left, leaving you with a blade through your face. Blood had gotten on my hands, but I quickly cleaned them up. Eren was asking around for you. Every person would shake their head, not knowing where you were. The superiors had found you, and announced you had fallen. It was all an “incident.” Eren would grieve for you, but I was finally there for him. Me, and only me. I was finally able to hug him, and let him cry on my shoulder. I finally had Eren to myself.



Eren still hasn’t recovered from that “accident,” but it doesn’t matter. I enjoy being there for him. I love hugging him. I love hearing his voice. It makes me happy. I am glad you are gone. Soon, Eren will forget about his “dear [First],” and look only at me. Everyone needs to know Eren belongs to me.



Eren is, and will be forever mine.



And no one will take him away from me.



Eren is mine.