Dear Santa, Please Make Stain Stop Sending Fan Mail

by Try_Two_Mothman

Summary:

What kind of chaos would ensue if Stain sent letters to The One-and-(not)Only Problem Child Himself, Izuku Midoriya?
.
.
.
.
“A-actually, Aizawa, uh, sir. He, kind of, sends me stuff.”

...

“Midoriya, kid,” Aizawa crouches beside the fidgeting teen, “this is really important. What kind of stuff did he send you?”

-

DO NOT REPOST WITHOUT PERMISSION

Notes:

Third time trying to post this ✌️

As I said in the tags, I wrote Koji every T i m e it’s says Kouji. I had to fix all of it, and then I was like who else did I spell wrong?

If you see any misspellings, don’t be afraid to say so in the comments and I’ll change it :)
Also if you’re triggered by anything, tell me and I’ll add a tw

I hope you like what I have!!

I’ll come out with another chapter eventually <3

Chapter 1: Chapter 1: Satan

Everything was going fine, or as fine as Class 1-A could be, Kouji determines. 

Yuwai was in his lap with her vest and little Santa hat on. Kouji’s heart warms and he smiles. 

What he doesn’t smile at is Bakugou exploding at Midoriya, both literally and figuratively. Instead, he flinches. And, much to Kouji’s surprise, Midoriya does too. 

There’s a story there. 

Kouji can’t ask about it right now, he thinks as he strokes the back of his bunny, because Todoroki looks like he's about to get physical. 

He really hopes no one gets hurt, but this is 1-A – Todoroki was already starting to frost over. The hero course has the record of having the most self-destructive rising heroes to uphold. When Aizawa shoots his capture tape and snags both of the offending students, however, Kouji winces. 

“Stain wasn’t this much of a child,” Todoroki spits, struggling to get free. 

Midoriya and Iida suddenly freeze. The dual-haired boy doesn’t register what he said until he’s free from Aizawa, and only then does he flinch. 

Interesting, Kouji notes. 

All of a sudden, Midoriya snorts like he’s unaware of the whole class’s gaze. Todoroki lifts the corners of his mouth up in an almost smile while Midoriya covers his beat-red face. 

Behind his hands, his words come out muffled. 

“I mean, you’re not wrong, Todoroki.”

Bakugou snarls and almost leaps over his desk until Aizawa glares at him. Midoriya cowers. 

Iida, surprisingly, adds on, chopping away, “He didn’t have as much of a tendency to blow up,” Midoriya snickers, “and be as, dare I say, infantile as Bakugou is on a normal occurrence.”

Midoriya wheezes while Bakugou goes feral. You could almost see the foam dripping from his mouth, Kouji muses. 

“Wait, wait, wait,” Kaminari interrupts Bakugou’s efforts to maim Midoriya, “you guys fought Stain?”

 “Yeah, bro, I thought the news said Endeavor?” Kirishima tilts his head as he quickly locks his arms around a writhing Bakugou, yet Kouji starts connecting the dots.

After the whole “event”, they all seemed closer, but Kouji had originally written it up to Todoroki passing the Dekusquad initiation or something. Now that he looks at it from a different angle, though, it all makes sense. For one, they all came back with injuries that matched what the Hero Killer would do, if Kouji is remembering the news’ report right. 

He looks over at both Todoroki, who is quietly laughing while holding Midoriya up straight as Midoriya struggles to breathe properly, and Iida as he stands as a buffer between the two squads. They definitely passed something. 

His thoughts went back to the mom-mode they’re usually in:  He really hoped they were okay after an experience like that – Kouji gets a flashback of the not-so-great times he’s lived through. He accidentally pulls some fur out of Yuwai’s back and is quick to apologize. 

After all, trauma was no joke. 

Well, maybe to the trio, but obviously not to Aizawa.

“I was not made aware of this,” Aizawa growls as he marches forward, ignoring the struggling Bakugou locked inside Kirishima’s arms much to the blonde’s anger. 

“Yeah, well neither was the public,” Todoroki hisses.

“Todoroki! Don’t say it like that! You know it was either this or…” Izuku trails off, glancing at the fuming teacher warily. 

Aizawa grounds out between his teeth, “Or what, Problem Child?”

“Oh, um,” Midoriya starts. 

“It was either let the Hero Endeavor,” Todoroki’s seethes, “take the credit, or we’d break the law.” His aura turns slightly vindictive. “At least he was pissed about it. It was fun seeing him squirm-”

“It was fun having Stain locked up so he wouldn’t be able to hurt or affect anyone else!” Iida hurries to interrupt, much to the shock of everyone. He throws an awkward smile toward the fuming teacher. 

“It- he, doesn’t bother us anymore, Sensei.”

Midoriya, looking like he wished that was the truth, clears his throat. Kouji wants to offer the bunny in his lap, but feels like it would be a bad time to do so. 

“A-actually, Aizawa, uh, sir. He, kind of, sends me stuff.”

The classroom freezes, figuratively, of course, because Todoroki only grunts mildly; he must’ve known some of what Midoriya was saying. Everyone else stops what they were doing:  Jirou quits pulling on her ear jacks, Kirishima loosens his grip on Bakugou, and Kouji stops stress petting – which he didn’t even realize he was doing – Yuwai.

“Midoriya, kid,” Aizawa crouches beside the fidgeting teen, “this is really important. What kind of stuff did he send you?”

Before Mineta can comment, Todoroki literally freezes his mouth shut. Kouji couldn’t be more relieved. 

“Well, um, since he rescued me? From the Nomu, uh, he’s been more than a little infatuated? With me?” He shakes his hands in front of the teachers face.

“Uh- not in like a romantic way! No! That would be disgusting! Um, it’s more like he admires me, I guess? He just- after he was put in prison, he said he would only talk if he could see me. I don’t know why, though, uh, because I’ve never had an interest in him. Well! That would be a lie; I wondered why he did what he did, but nothing greater than that…” Midoriya trails off at the look Aizawa gives him. 

“E-either way, I realized that, if he didn’t talk, they – the cops – wouldn’t be able to do anything? Even though he has done all this stuff, he could reason against them by saying most of the people he killed were, well, dead, and the heroes that were maimed were either attacked from behind so they didn’t get a good look or, or weren’t really in the best cognitive state, as with Ingenium’s case.”

He quickly apologizes to Iida, to which Iida nods in understanding. 

Midoriya looks like he’s about to cave into himself. This is where Kouji finds himself almost standing up to help the green bean out. Poor Midoriya.

It takes a hand on his shoulder from Todoroki for Midoriya to choke out his next words. 

“There’s, uh, more. I-I visited him last Thursday.”

The whole class descends into chaos. 

Todoroki flinches away but quickly recovers and goes back to comfort his friend. Everyone else? They scream and Kouji’s eardrums feel like they’re going to burst. 

He’s not the only one to, sadly. He can see Jirou cover her ears too; well now, doesn’t that just bring up good memories, Kouji thinks to himself as he shrinks into himself. 

At least the people closest look apologetic, Kouji reasons.

Aizawa’s eyebrow twitches. “Alone, Midoriya?”

“Oh no, no!” Midoriya reassures, “My mom came with.”

“You idiot, Deku! Why would you risk Auntie’s health like that, you shit stain?!” 

“She- she was behind the glass! I only needed her for moral support and because they wouldn’t let a- a high school kid go alone, Kacchan!”

Kouji, not liking the way Midoriya’s big doe eyes were starting to water, stood up and walked to the middle of the mess. Everyone parted.

Eventually, he made his way to Bakugou and forced Yuwai into his arms; Bakugou, not knowing what to do but not wanting to harm the bunny, held her firmly and backed away when Kouji uncharacteristically glared at him. 

Once the threat was taken out, Kouji stood beside Aizawa and, on a piece of paper, asked if Midoriya could understand sign language. Since the greenette wanted to get out of the situation as soon as possible, he nodded frantically. 

‘What did Stain send you?’

“Oh! Uh! It was nothing, just a letter telling me how much potential I had to be a hero, pretty much.” Aizawa sighs and Midoriya scratches his head before continuing, “It was...different compared to my other fan letters from Kouta and Eri.” He laughs and the class deflates. 

Kouji presses on. 

‘When you visited him, did he say anything?’

This time, his laugh is less Midoriya-like. “Well, he, uh, kept going on about his ideology? Huh, he um,” Midoriya swallows, “he said he should’ve killed Iida and Native.”

Todoroki, seeing his cue, rubs Midoriya’s back in a comforting manner. 

“I-I asked him if he admired me, and when he said yes, I asked i-if he would listen to me .” Aizawa rests his hand on Midoriya’s knee as Kouji asks him what happened next. “He said yeah—” his voice cracks—“and that, if I killed him, he would thank me, which is a mood when it’s not c-centered around you, you know?

“I then basically told him t-that, if so, he would listen to me without i-interrupting. I told him off, pretty much; I kept hammering in the point that people can be a hero, no matter how useless or- or even if they originally didn’t, uh, if they’re pushed in the right direction – Iida could be a hero, especially, since he recognized his faults after seeing what the consequences could be, sorry Iida.” Iida flushes.

”He wouldn’t believe me. So instead I asked him what he would think if All Might told someone quirkless, someone useless, that they couldn’t be a hero. 

“He basically responded with a ‘what All Might says, goes.’ I-I then asked him,” Midoriya pauses and looks between Kouji and Aizawa, then glances at Bakugou, “what if said quirkless person was me.”

Luckily, though, Midoriya isn’t quirkless; it was all hypothetical, Kouji thinks to himself while he steps back to let the other breathe, right?  

If he got his quirk late, however, that would explain why his quirk kept destroying his body in the beginning. It would also explain his flinching at his childhood bully. 

Midoriya barks out a self-deprecating laugh. 

“I sure did shock him! I think I made him have a midlife crisis,” Uraraka snorts but covers her mouth. Kouji honestly forgot the rest of the class was there. 

She blushes, “What? Imagine Stain – the Hero Killer – crying over a literal child who, guessing by what Todoroki said, yote him into the trash!”

The trio of troublemakers cringe.

“I think I changed his mindset though! Or at least did something because he was quiet for a long time!” Midoriya interrupts, not wanting to lose his train of thought, “I, um, actually, kind of pulled an ‘uno reverse card on your ass’ with the whole quirkless segregation, and he just couldn’t handle it, I guess.” He took a deep breath to steady his apparent nerves. 

Kaminari whistles. Aizawa groans. Midoriya smiles cheekily. 

‘Are you okay?’

Midoriya blinks before ‘oh’ing, then contemplates his answer. 

“Yeah, surprisingly. I wasn’t as stressed as I thought I would be, yelling at a murderer, but it all worked out in the end? Not that I wasn’t shaking in my boots!” Midoriya pouts. “I hope he took my message seriously.”

“Midoriya, he, uh, did.”

“Iida?”

Iida silently goes over to his desk, pulls out a paper, and hands it over to Aizawa with shaky hands. Kouji doesn’t get to read all of it – Aizawa turns so no one can see – but he got a good enough glimpse to piece some together. 

 

Ingenium, you’ll know who this is.

The brat isn’t forcing me to do this, but I don’t want to disappoint him. He made me see the error in my ways. 

I guess you really did change if he’s willing to be your friend.

Don’t get corrupted again. 

And that’s all Kouji gets before Midoriya gasps and Aizawa crumples up the paper. The teacher then turns expectantly toward Todoroki. Understanding what needed to be done, the bi-haired teen nods and robotically makes his way to his bag. 

With some reluctance, he hands the letter to Aizawa. 

“I wanted to show you first, Midoriya, so I apologize.”

“Uh, it’s okay Todoroki!”

Kouji startles when he sees how little there is on the note, and he’s especially surprised with how “inviting” Aizawa was with it.

 

Endeavor’s kid,

You’re alright, according to your little hero. You also came to his rescue, so gotta give you points there. 

Don’t let your father destroy you or your legacy, I guess. 

Also, get better at tying knots.

 

This time, the letter is signed. 

Kouji internally reels, yet realizing that Midoriya is unintentionally depending on his reactions – and, of course, Aizawa doesn’t exactly know he read both pages – stays stoic. 

Kouji thanks the other teen for opening up to them, even though it was in front of the whole class, to which Midoriya just smiles awkwardly at. Aizawa emits an aura that Kouji doesn’t want to deal with, so he gently takes the now-damp Yuwai from Bakugou’s arms and speeds back to his seat. 

How embarrassing it would’ve been if he lost his cool in front of all his classmates, Kouji sighs, and while Satou gives him some napkins to try and pat some of the sweat off before Yuwai combusted, Aizawa guides Midoriya, Todoroki, and Iida out into the hallway. 

Kouji almost snorts when Aizawa remarks that he needs another coffee. 

He could find out what fully happened later from his friends lingering in the hallway – Kouji’s surprised the idea of talking to insects ever grew on him. 

Right now, with his classmates roughhousing around, his bunny being taken care of, and newly found inspiration, he had a letter to write.

Chapter 2: Santa

Summary:

It’s kinda rushed and I don’t recommend reading it if you have the following triggers:
BLOOD (someone being stabbed, same person bleeding, bloodstream) paragraph 2, 4, 21
BEING STRAPPED TO A TABLE/GAGGED (Any mentions too) paragraph 6, 11, 13
NEEDLES (IV) 19

If you still wanna read it, I’ll put the paragraph number by it

There’s a scene with multiple of these triggers, and I tagged it with * at the beginning and at the end

If I missed any, please tell me so I can edit the chapter

Notes:

Hey sorry for giving up halfway aksjsk (tell me if I misspelled anything or something doesn’t make sense, and I’ll fix it)
I also think it’s shorter?? But I t s f i n e
Stain enters the chat

Again, if I missed a trigger, I’m very sorry.
Please tell me where it is and I will add a warning for anyone who may have that trigger as well

What has he become, Akaguro asks himself, depending on the mistakes of one guard to escape. It would’ve been a simple job, really, in his prime. He could’ve done it in less than a week, and alone.

2- But now, he was stabbing the guard who got too close to the food flap with a chicken bone he saved from last week’s meal. Akaguro was surprised they hadn’t thought he would go as far to do that. 

He wasn’t going to take this guard’s mess up for granted. Also, hunger was a great motivator. 

4- The alarms rang overhead, but Akaguro didn’t panic. He couldn’t afford to. Instead, he yanked the cop’s arm further into the slot, repeatedly banging her head on the door until she slumped. He reached down her body and removed the keys that were slick with blood in one swift motion, unlocked the door, and bolted. 

He didn’t get far. 

6- He’s pricked in the back of the neck and, next thing he knows, he’s waking up gagged and strapped to a table. Luckily, he thinks as he starts to pick at the binding, his hands weren’t exactly visible. 

He snorted:  Even in all his years of vigilantism and eventual villainy, he had never been mistreated like this before. 

At the sound of heels clicking against tile, his head shoots up and groans when he sees a head of neon yellow enter the room. Not her . 

He had never bothered to learn her name, but he knew  that whenever she came it was always trouble for him. 

“Merry Christmas, Hero Killer! Are the knots good? I hope they are.” Her mocking tone grates on his nerves; He rolls his eyes. 

11- She carelessly tosses a large envelope and struts toward his struggling form. When he tries to bite her through the gag, she laughs and tears it out. 

“Stain, you have to try harder than that.” Her eyes gleam. He jerks toward her and takes pleasure in seeing her flinch away in surprise and back up. 

13- Throwing the gag back at his face, she plops down on the desk, then once he finishes spitting fibers out of his mouth, she picks up the envelope. 

He speaks. 

“If I tried to rip out your throat, I’d be killed.” She hums in agreement and nods. 

“You’re not wrong, Stain, but I thought you’d be better than that. You’re a murderer, not a child.” 

He glares at her as she pulls out a small silver box and presses a small button on the side. 

His left arm instantly goes numb. 

19- “I’m sure you’ve noticed the IV by now,” he glances at his now numb arm in acknowledgment, “and you must be wondering what it does, or thinking of ways to use it to your advantage.” She pauses as he tries to struggle out of his bonds. “Well, you can’t.”

His chest gets tingly. 

21- “What they created – the scientists, I mean – will slowly make its way through your bloodstream. Once it gets to your brain, you’re done. That is,” she holds up the box while his waist and below goes dead, “if I keep pressing the button.

After she let’s go, his chest stops squeezing. Suddenly, the box rolls casually out from between her fingers and lands button-side down on the floor. 

She huffs when he doesn’t give an obvious reaction, but she not knowing about the burning spreading throughout his body, his face, won’t hurt her. She laughs like she knows. 

“I wonder why you aren’t talking, as I removed the thing preventing your ‘principles’–” she air quotes– “from being preached.”

Stain slurs out his answer. 

“‘m naw lettin’ you ush my wors agnst me.”

“What do you mean ‘against you’? This isn’t the court.” He grunts. She giggles. “You like that? I’ve been working on it all week.”

Sure, if he wasn’t almost passing out.

“This was the third attempt, though, yet it couldn’t go any better!” He started to despise her as she glanced down at the still-down box. 

“I completely forgot about this!” She slowly picks up the box; the tingling gets more prominent, but he can start to feel his digits again. 

She sets down the envelope she had been fiddling with for the past few minutes, walks up to him, and proceeds to wipe the drool trailing down his jaw on her sleeve; then, she leans forward. 

“Now’s a time as any to tell you about those letters you sent out. Don’t think I didn’t read them, because I did; after all, who do you think allowed them to be sent out.” He can smell her perfume. “And don’t forget that, Stain. Nothing you do can be done without my permission. Just because you got lucky with those hero fledglings does not mean you will get lucky in my building. I am the one who determines what happens to you.”

She moves back, straightens her jacket. 

“But you’re one of my favorites, so I won’t do anything too mean.

“Now! Shall we see what’s in those letters that the amazing Hero Class of U.A. sent? Hope they’re not any fans because we both know you have enough as it is.”

She finally goes over and opens the envelope. It’s not much, compared to all the fan mail he’s either sent or received, but it’s from U.A., which Midoriya goes to, so he’s paying attention.  

“You know what’s funny?” She asks a dead crowd. He starts wiggling his toes and fingers to get ready just in case anything happens. 

“Their teacher, the one who allowed Bakugou Katsuki to be captured, the one who let you almost murder three of his kids, the one who can’t even keep villains away, did absolutely nothing to stop these kids from sending letters. How sad.” 

When she grabs the first envelope, a light pink one, she slices it open. 

He doesn’t care what the teacher is like, he doesn’t even care about these envelopes unless a certain greenette sent one. 

He won’t get pissed that she’s talking down to a hero that probably deserves some of what she’s throwing, especially since he let Midoriya almost be killed. Multiple times. 

When she notices that she doesn’t have his sole attention, she clears her throat loudly. He starts to feel his arms as she exaggerates her hand gestures. 

“ Dear Stain,” she mimics a young girl’s voice, “oh I like this already, is it really true? Did midobro really defeat you and not Endeav- that’s enough of that kid.”

He exhales out an exhausted sigh. 

“Oh! There are more people on this letter, let’s see,” she trails her finger down the writing, “that was a Kirishima – what, no first name? A Kaminari, a Mina, and,” she ‘aha’s, “a Sero! What a lovely bunch.”

Crumbling up the paper and shoving it in the envelope, she grabs at the mess of papers next to her greedily. 

This one is in a red envelope. Stain moves his legs while she’s inspecting the paper. 

“This one doesn’t have a signature, a pity.” She licks her lips. 

“Blah, don’t mess with Deku, what kind of a letter is this?” She carelessly tosses it with the other letter. 

Deku?

There are four letters left. Ripping them open, she doesn’t notice him moving his head around. 

“Kouda… Oh, a Todoroki, and even better, an Iida!” At his obvious confusion as to why she wasn’t reading any of them, she snorts. 

“We only have a few minutes left, and they wrote quite a bit.” She emphasizes her point by dropping more than a few pages. 

Through the strewed papers on the floor, he sees a letter from Midoriya. 

Midoriya. 

Noticing this, she stomps and twists her heel into it. 

In retaliation, he spits at her. Granted, it doesn’t go as good as he wants, but it’s way better than he thought; the serum’s wearing off. 

She looks like she’s about to spit back, but he can’t feel any regret. 

Instead, her heels click on her way back to the door, and with a goodnight yelled over her shoulder, Stain is thrown into darkness. 

 

---

 

 

Overall, her visit before she walked out was less than ten minutes. 

To Stain, it felt like an eternity. 

It all paid off in the end, though, he chuckles, after all, patience is key in a situation like this. 

*
He stands to his full height, his back popping as he does so. He brings the needle to his lips and licks the blood just to be sure. 

He looks down at her mutilated body, her yellow hair stained red. He’s getting rusty.
*

Careful not to trip over the woman’s body – a bother really – he grabs the envelopes, paying special attention to the trampled one.

He looks through it. 

“Izuku Midoriya, I just knew she was hiding something from me,” he says as he grins at the note. 

Stain hisses in frustration; after all the work the teen had put into it, she just...

He glances back at the kid’s chicken scratch, and he smiles. 

After looking at the letter, not reading, he gives up and slides through the unlocked door. He ignores the sirens, goes left. He keeps going on until he gets to the front desk, unnoticed, and only when the secretary turns around does he strike. 

He can feel himself breathe again. 

“I’m sorry Izuku,” he whispers to himself, “I can’t live up to be the hero you want me to be. I’m only good at burning the trash the community serves.”

An idea strikes him. 

What better way is there to apologize, than to meet his favorite student in person. 

Having newfound determination, Stain takes his first step into the night, much to the oblivion of the students of U.A. 

Notes:

Hope you noticed how I called him stain after everything :))
He was swallowed by his persona

Stain: does anything
Woman: you’re not a child
Me: flashbacks to todoroki

I also love how I barely mentioned Christmas lmao
My next thing?? Probably the letters stain sent and what letters were sent back, but I haven’t started writing it sooo

Series this work belongs to:

• Part 1 of Santa meet Satan meet Stain