𝚈𝚊𝚗𝚍𝚎𝚛𝚎 𝙱𝚗𝚑𝚊 𝙷𝚎𝚊𝚍𝚌𝚊𝚗𝚗𝚘𝚗𝚜/𝚂𝚌𝚎𝚗𝚊𝚛𝚒𝚘𝚜

Yandere Mirio Headcannon

Word Count: 1038

- I imagine you both first met as either a first or second year, you also being in the Hero Course and gaining popularity among your peers for your powerful quirk and "cute" personality (you would tend to be shy, quiet, kind, etc.)

- When Mirio first spoke to you, congratulating you on a battle you won during a Hero Class, he remembers clearly how you smiled shyly at him and thanked him. Your voice, your looks, your personality... similar to Deku, he just knew it was love at first sight

- Mirio would be a mix of an obsessive, protective and delusional yandere (I suppose that "obsessive" and "protective" in this case are very similar). Ever since the day you both officially met, he makes it his goal every day to be by your side whenever humanly possible. For example, walking by your side from class to class, keeping an eye on you during classes (staring at you during class), and always walking you home. In his defense, whenever you ask him why he spends so much time with you, he says something along the lines of "You're just so nice to be around!" or "I just can't keep myself away, you're so kind and fun!" which makes you very  flustered, so you don't question him much afterwards 

- Nejire and Tamaki would think it was sweet that their friend gained a love interest, but would begin worrying when they began noticing how much time he'd spend with you, almost forcing hangouts onto you and abusing the fact that you were a very shy person and just couldn't say "no" to him

- They would approach Mirio one day and Nejire would be in charge of most of the interrogating, bombarding him with questions and Tamaki ending by saying "We're just worried for you, Mirio. It's just... you've been acting a bit... off...." "I don't know what you mean!" Mirio answered, flashing his signature "Mirio smile" at them. "I won't have you two worry about me any longer though! See, I've just been training with Y/N often because they need help with strength training..." Mirio continued his list of why he's been "off". "Oh, um, if you say so..." Tamaki and Nejire were skeptical of Mirio's well-formed response, but they ceased their interrogation and left

- Some would assume Mirio was lying when speaking to his closest friends, but in reality he wasn't, or at least to himself he wasn't lying. He truly believed that the both of you had a special bond, and that you being timid and quiet around him was a sign of you loving him too and that you were just the shy type. To him, you avoiding him was just you being embarrassed in front of your crush. 

- Despite him not wanting to make you embarrassed because of how much he cares for you, this child's behavior is one of a lovesick puppy that always want your attention by any means necessary. That could mean impressing you during training, constantly cheering you on during your practice fights, and getting rid of anyone who's stealing your attention away from him

- He would stalk you for sure, being that its so easy for him. He'd watch you while you sleep, thinking  the way you tossed and turned in bed was adorable, hoping, no- knowing that you were dreaming of your beloved. Would probably pet your arm or head as he watched, and then kiss you on the forehead before he leaves

- It'd take him a bit longer to actually go out of his way to kidnap you. It probably would've happened after a big fight with a villain and you got badly injured, in which he'd see it was his duty as your lover to keep you safe and protected from all this evil (keep in mind that he likes to call himself your "lover," even though you don't see him that way)

- Once you are kidnapped, it'd be easier to just pretend you're in love with him until you trick yourself into actually believing it instead of trying to escape. 

- He loves and adores you oh so much, why can't you see that? He just wants to protect you from the big, scary world. Plus, you get to be spending all your time with your loving boyfriend! What could be better than that?

- He genuinely believes that you adore him just as much as he adores you, and that you're just adjusting to the change in the enviorment

- "Please let me go! I promise I won't tell anyone what you did, just Mirio please-" "Shh... you're just tired, sunshine. You should get some rest while I prepare us a nice dinner! Im going to make you your favorite, F/F (Favorite Food)! I do hope you'll let me feed you this time, you know I can't unlock those chains. It'd be too dangerous."

Other Notes (Slight Nsfw):

- He wouldn't punish you often for misbehaving, and when he does, he wouldn't use violence of harm you physically in any way. He'd just keep you alone in a dark room for awhile for you to realize how much you both need each other. "Its for the best, sunshine!"

- His nicknames for you: Sweety, Sunshine, Sunflower, Darling, Cutie

- His worst/best punishments happen after escape attempts. It all depends on how much you despise or "love" him at this point. He sees your attempts as him "Not showing you enough love" so he does what he thinks is best, and does the you-know-what.

- Note: He won't forcefully rape you since he doesn't think that's the best way to treat his sweet little sunflower. He simply pleasures you is all. He pleasures you until he knows that you won't ever try to leave again because you know how good he can make you feel 

- Would probably just plant kisses across your body, and mark places like your neck, chest, etc. (He loves seeing his little marks across your body). Would be very slow and relaxed with his movements, to have you fully feel his touch across your skin and have you begging for more