AN: This was... a hard one to set up, not gonna lie. I'm not too sure how many are willing to even read this kind of story, let alone be willing to the idea of a crossover between an OC concept with mha. Some elements of my oc is altered for the sake of the plot, just as some mha canon had been tweaked to fit the story. But overall, this one is a slow build-up, hopefully to set up a proper avalanche plot, so to those who had been willing to read this, thank you for stopping by. I hope this story will intrigue you. Much of this is not edited, so sorry for any mistakes made.

AN2: edited at 26/03/2023


Signs of a Serial Slasher?! 89 missing children found malnourished and wounded in an abandoned building in Chiba prefecture!

At 1:36 am today, 89 children that have been reported missing for weeks were discovered in an abandoned building within the streets of Chiba. All were found unconscious and severely malnourished with slash wounds on their arms. Police investigator, Enemoto Kana who leads the investigation has shared their findings, concerning families and communities affected by these events.

'By no sheer coincidence do we find ourselves suspecting that this is a more than just a simple case of kidnapping,' Enemoto states. 'Upon compiling the recent rise of kidnapping and victims found wounded and unconscious within the nation's metropolitan areas; what was once assumed to be isolated incidents might have been orchestrated by the same suspect. The suspect's modus operandi we have uncovered followed a particular pattern. Number 1: all their victims go missing for a number of days or weeks. Number 2: the victims found all show signs of lacerations and slash wounds on their arms. Number 3: All surviving victims suffered through a short-term memory loss within the time period of their absence.

Several articles across the news sites all covered the same incident one way or another. A few journalist interviews from neighbours and the victims' families expressed their fears and concerns. It was, to no one's surprise that hero agencies across the nation were briefed of this incident. The analysts who contributed to the investigations shared their findings before the Heroes Public Safety Commission, to which in turn, briefed all the pro-heroes through the HN. Both police and the safety commission made it clear not to disclose the possibility that the culprit was more than just one suspect. Until a substantial, tangible evidence could be found, these were the terms all involved had to abide.

Endeavor set a formal briefing for specific members of his agency on the matter; relaying the news of the safety commission's instructions.

"So in other words, you're telling us that we don't know what we're looking for; but the higher-ups are telling us to be on the lookout for potential suspects?" Shoto folded his arms, his brow deepened after the analyst shared their insight.

"Everything on how we operate will remain as is," Endeavor announced. "The investigators from the police department and hero agencies will be the ones to do the heavy lifting. Our job this time around is to keep our eyes and ears sharp on anything we encounter on patrol."

"Then there's also another thing to consider," Burning added. "There's a strong possibility there's a memory-eraser quirk at play here, based on the CT scan results on our most recent victims. All victims with short-term memory loss showed no signs of brain trauma or any biological tampering. Therefore, whatever quirk this is, the quirk user has the capacity to erase any trace of themselves from anyone's minds."

By the time the briefing came to an end, everyone had set themselves up for their patrols and duties. Izuku Midoriya, hero name; 'Deku' frowned at the article that covered what was now known as 'the 89-incident' on his phone.

"Midoriya," Shoto tapped him by the shoulder. "We're waiting on you."

"Oh, right!" Izuku locked his phone screen and pocketed the device. "Coming."

As he trailed behind Endeavor, he fastened his air-force glove and headed out into the street.

"Remember the briefing, boy," Endeavor said. "We're not combing the streets for the suspect serial slasher. We're only making our usual rounds."

"No need to tell me twice," Bakugo retorted.

Shoto nonchalantly said; "That's unusual of you, Endeavor."

"…Let's go."

"Yes sir!" all three interns answered.

Now that I think about it, thought Izuku. Endeavor would be the type to take out a search party in times like this. I wonder why.

He let the thought pass as they carried out their patrols, carrying their duties as peace-keeping citizens of the law. As the day stretched onwards, nothing of note had crossed their vantage; not even a peep or a sign of the serial slasher. By the time they set themselves up for a break, they settled for a building rooftop as they ate their lunches.

"There's been something that's been bothering me for a while," Izuku said. "Why would the villains responsible for the 89-incident return their victims back to the public?"

All three heads turned towards Deku.

"I mean," he quickly added. "I'm not hoping for violence and death onto the victims, but isn't it strange that the serial slashers are keeping their victims alive? Wouldn't it normally be the case that they'd keep them captive if it meant risking their identity?"

"Why should we care, Deku?" Bakugo retorted. "Looks more like they're doing this for sport. And besides, their memories were erased. Those bastards must've been smug enough to get away with it in all thanks to some kind of memory eraser quirk."

"I'm not too sure about the matter myself," Shoto added. "When you bring it up like that, Deku, that does bring a lot of questions."

Endeavour, who had been listening, interjected; "The analysts from all fronts of the investigation said the same thing. With the amount of intel gathered, the analysts suspect these villains have been cautious enough to hide their crimes amidst the chaos of other villain attacks."

"Deku narrowed his eyes, "So then-"

"-In other words, the 89-incident was a misstep on their part," Shoto concluded.


The end of the day bore no news of their elusive villains and no signs of any major issues during their patrol. Even so, a quiet anxiety lay in the back of their minds, knowing that somewhere out there another victim may have fallen victim to the serial slashers' attacks. Nevertheless, the three interns were scheduled to go back to their dorms that day, leaving Izuku to linger upon the matter itself.

"Staring at the floor won't get you anywhere," Todoroki said, breaking the green-haired boy's trail of thought.

"Oh, right," he gave curt nod, only to slump his shoulders. "Something about that incident doesn't feel right to me."

"Tch," Bakugo clicked his tongue irritably. "Damn nerd, of course there's nothing right about it!"

"I can't exactly put my finger to it," Izuku continued. "But something about the villains responsible feels… different."

"How so?" Todoroki asked.

"I mean, the league of villains does things differently from them," Izuku began. "But I've never heard of a villain leaving their victims out in the open in places where anyone could find them."

The mere mention of the league of villains dampened the mood even further. Granted, not all villainous acts are conducted by the villain league, but that didn't mean they could shake off the possibility of their involvement. After all Shie Hassaikai case turned out to have been affiliated with them-

Oh, then Izuku realised. It's probably because of Eri.

The fact that Eri was around the same age as the 89 missing children must have been the reason he felt so uneasy. Perhaps this was the reason why this whole incident felt different, and to some degree, personal in effect.

Koda's also at that age too, he thought.

The realisation troubled him even further.

Maybe when we get back, I'll ask how everyone's doing.

He then shook his head, slapped his cheeks to shake off the glooming stupor.

"Right, I'm going to do my best," he declared.

Todoroki cracked a smile, "Yeah."

Bakugo scowled, though the grump on his features had lessened.

In that moment, he felt the ground on his foot soften. "Eh?"

Izuku looked down.

Beneath his red shoe lay a white, stuffed doll on the ground. To his horror, the doll squirmed under his foot. "HEEE!"

He jolted, removing his foot away, revealing a strange… thing.

"What the hell Deku! Stop being so jumpy!" Bakugo yelled.

"Sorry!"

"What is that thing?" Todoroki pointed.

Izuku made a double take, making certain what he was wasn't just him imagining things. On the one hand, it looked like a white, sackcloth creature with a head wearing a grey, rabbit-eared beanie. Then the creature started to wiggle on the floor, only to roll on the ground till it lay on its back; revealing two black, beady-looking eyes.

"What the hell?" Bakugo glowered in disgust.

The creature blinked, then rolled on the ground all over again. What stuck out the most was the shoeprint on its body, clearly marked by Izuku's lack of awareness of his surroundings.

"What is it… doing?" Izuku gingerly asked.

"…I'm not sure," Todoroki deadpanned, while visibly confused. "It looks like a raindoll rolling on the ground."

The creature kept rolling, only to stop, the corners of its cloth wiggling in the air before it resumed to roll again. All three UA students were stupefied at the sight, uncomfortably confused at its odd behaviour. Bakugo was the first to snap and grabbed the rolling creature off the ground.

"Get out of the way you cretin!" Bakugo grabbed the creature off the pavement. "Stop loitering around the streets like a nuisance!"

"Uh, Kacchan," Izuku said sheepishly. "I don't even know if that thing understands what you're saying-"

"You two stop dawdling and start moving! This creepy bastard's not worth the attention!"

The sackcloth creature suddenly twisted its head towards Bakugo like an owl, its mouthless face and expressionless eyes stared intently at its holder.

"Uh-!" Bakugo flinched; unnerved by the strange eeriness it was giving off.

Izuku inched away, Todoroki raised his brows in surprise. With its one, lone hand, the sackcloth creature raised a grey, rabbit doll in front of Bakugo despite being held in the boy's grip. The explosion murder boy froze, creeped out by its unnerving void-like eyes staring at him.

"Get." Bakugo gritted. "The. Hell. AWAY FROM ME!"

Sparks on his fingertips caused a chain of firecracker-sized explosions, blowing it up on the pitiful creature as he threw it across the empty alleyway. The other two gaped as the now-flying sackcloth creature disappeared into the farthest distance. Without a second to spare, Bakugo turned his back and started walking.

"tch," he scowled, trailing away. "To hell with that thing. I ain't gonna be the guy who'll be late for curfew."

As if on que, Todoroki gave one last look at the direction of the alleyway before he followed his classmate in toe. Izuku glanced from his departing friends to where the creature had disappeared, fidgeting on what had just happened in that moment. On the one hand, it had been a while since he saw his childhood friend 'explode' like that. On the other hand, it wasn't as if he didn't know where he was coming from. With a little reluctance, Izuku ran after his friends before he gave a silent apology to the strange creature for Bakugo's behaviour.

"What was that thing anyway?" Izuku began.

"Don't care. That thing gives me the creeps," Bakugo retorted.

Todoroki held his chin in thought before he uttered; "Teru-Teru Bozu."

"Hah?"

"I did say it looked like a raindoll," Todoroki mused.

"Teru-Teru Bozu, huh," Izuku muttered. "If it was one, then it could've been somewhat related to someone's quirk. Like a familiar or a puppeteering type of quirk."

"Then you're suggesting it might've been a prank?"

"I mean, Rody's quirk had Pino, right? If anything, that might've been someone's extension of their quirk or something."

"Oh, right. That Otheonian during the Humarise mission."

"Speaking of, I'm just about finished writing the report on that incident when we infiltrated their hidden base-"

"Hah?! You slacker, what have you been doing in the past couple of weeks, huh?!" Bakugo interjected.

It didn't take long for the conversation to shift from their strange encounter over into the subject of their next quirk history test. By then, they were already walking along the UA fence.

"-I do have some questions regarding the hero laws around vigilantism-" In the corner of his eye, Izuku froze mid-sentence.

No way.

"Midoriya?" Todoroki said quizzically.

Izuku cocked his head over his shoulder and immediately saw it. The sackcloth creature, marked with his shoeprint was waddling its way towards him. With its only hand, the creature dragged the grey rabbit doll on the floor as it made its strange strides. His obvious panic brought the other two interns to follow his gaze in astonishment.

"It's following us?!" Izuku yelped.

"That little bastard," Bakugo said angrily.

"…More importantly, how did it catch up so fast?" Todoroki added.

The sackcloth creature tripped a second later, falling face first on the ground; only to roll forward until it managed to pick itself up. Upon raising its head up towards the three UA students, it raised its rabbit doll before them.

"…I'm going back," Bakugo declared and resumed walking his way towards the UA gate.

"Uh, yeah, good idea," Izuku quickly nodded, shifting his gaze as far away from the creature as much as possible.

Todoroki casually followed them, almost downright ignoring its existence.

What is going on? Why is that creature following us? Why is it carrying a rabbit doll like that? The green-haired boy was sweating bullets, thinking about the endless reasons why it was following them around.

"I don't know what you're thinking, but relax," Todoroki said. "Once we cross the UA barrier, it's probably unlikely to get past it."

"Oh, that's right," Izuku realised. "I almost forgot that."

And to their dismay, even upon crossing the gates, the little creature trailed after them, casually crossing the security barrier with ease.

"It crossed the line!" Izuku panicked.

"Stop panicking or I'll kill you!" Bakugo chided.

"Huh. So it did," Todoroki mused.

"What does it want? Why is it following us?"

"Maybe its some kind of vengeful spirit, following you around after you stepped on it," Bakugo said in his harsh sarcasm.

"But you're the one who threw it with your explotions!"

"Shut up! I tossed it over 'cause it was in the way!"

"Maybe it might be as you said, Midoriya," Todoroki said thoughtfully. "Could it have been associated with a UA student's quirk?"

Bakugo's vein bursts at this, "Hah?! As if we had someone in UA have a lame ass quirk like that in our school! If they did, how the hell were they able to pass the practical exam with a quirk that weak!"

"But not every student in UA applied for the hero course-"

"I know that dumbass!"

By then the creature managed to catch up to them, its blank expression showing no signs of fatigue when it stopped and stared at all three of them. This turned the three's attention to the walking sackcloth. The creature blinked, then raised its ragged rabbit doll at all three of them.

"…"

"…"

"…"

"Um," Izuku fidgeted. "Hello?"

The creature tilted its head at him.

"W-Why are you- I mean, are you lost, somehow?"

The creature shook its head.

"S-so then, is there something you want from us by any chance?"

The creature looked down for a moment, waddled a little closer to the green-head and raised its rabbit doll at him.

"This is stupid, I'm calling the teacher," Bakugo turned his heel and started walking.

"Hey wait! You can't just leave it here in campus like thi-!"

"I know, stupid! That's why I'm calling Teach!"


"I don't know what I'm looking at, or why you asked me to use my quirk on this thing."

My Aizawa closed his eyes, giving out one of his long, exasperated sighs.

"So it isn't a quirk," Todoroki said.

"Not necessarily," their homeroom teacher folded his arms, eyeing the creature that was now gleaning at the teacher's faculty room. "If it's a quirk that's not an emitter type or it has a passive quirk factor like a mutant type, I won't be able to erase it. This however- seems like the latter."

"Then, do you have any clue if there's anyone in school with a quirk related to this?" Izuku persisted.

"I'm not entirely familiar with students outside of the hero division, so no," Aizawa answered. "Hero and support division have closer ties to each other compared to general and business. You should be aware that just because all schools keep a record of every student, doesn't mean all the staff members are aware of every student's quirk outside their respective classes." -he then paused- "The next best thing is to send you over to Principle Nezu, but only if he's not too busy with his schedule. Maybe he can grant you a drop of wisdom for whatever that is."

The creature began waddling in circles on top of Aizawa's desk, still dragging its grey doll with its lone hand as it moved along. Izuku couldn't help but notice the teachers present glancing at the creature in silent curiosity.

"If it did cross the UA barrier with ease, that does spell out trouble," Snipe, who had been listening in, casually added. "It's worth bringing it up as a matter of concern."

"We don't even know what it is, nor do we know why it tailed our troublemakers here," Aizawa deadpanned. "So far, it's harmless enough to do nothing but look stupid. Honestly, is this the year of making the UA barrier a joke?"

"Hah! You got that right," Cementos scoffed.

Izuku raised his hand, "Um, Mr Aizawa? What are we gonna do with it in the mean time?"

Aizawa gave one long look at the creature as it made its 8th run around his desk. With another huff of displeasure, he decided; "Leave this thing with me for now. Better to be safe than sorry, given how many villain attacks you first years had to sit through."

"I see."

"Now all three of you head back to your dorms. It's an hour and a half before curfew starts."

As soon as the students left the faculty, Aizawa stared at the sackcloth creature that had stopped running in circles and turned its attention towards the door. It took one step away from his desk, prompting the homeroom teacher to grab it by the scruff of its neck (if it you could call it a neck). The creature began flailing, the corners of its cloth which he assumed to be its feet started wiggling in protest.

"You're not taking another step," he said to the thing. "Not until we have you figured out."

The creature stopped flailing and turned its blank gaze towards him and blinked.

Aizawa sighed, "Looks like I've got my work cut out for this one."


The silence of the night only heightened the tension in the air as Reina stood by the top of the roof. Too many children. Too big a number to hide that mage cult's crimes.

This does not bode well.

These dead hours after a long debriefing of their operation left their members feeling more worried than frustrated or determined. Joined by her superior Tinders and Cobe, another of her teammates, these short hours were the only times they were able to rest before their departure to the Mystic Isles.

"What will happen now?" Reina asked. "By now, the safety commission will now be extra vigilant."

Tinders, who held her tea in her hands, sipped from her mug then raised her head to the cloudy night sky.

"For as long as the HPSC would fail to see the forest from the trees, we're still in the clear," Tinders replied. "Endowments and Gildaar magic could be mistaken for quirks for now, so for as long as we keep to the shadows, everything else seems to be in order."

Cobe closed his eyes, his ragged, white hair fluttered by the wind's ominous breeze. "There is no order in this land. Only chaos in the guise of peace; held together by a tiny thread of hope. But with the state of this quirk society, by the emotions I felt of every passing citizen, I fear there lies an omen of something bigger. Something far worse than anyone could hope to imagine."

Reina kept a straight face, grasping her bandaged arms. "Commander Spike said this nation might break out into a civil war. Said that if it happens, it'll be easier to track down every mage that slipped through the cracks amidst the chaos."

"Everyone knows it'd be the worst-case scenario if we don't take out the mages before then," Tinders grimaced. "He isn't that cruel a man as to allow chaos to escalate to that degree."

"But in the end, we can't even interfere with the league of villains, in spite of that," Reina squeezed her arm.

Tinders eyed her and took another sip. "They aren't our priority anymore. Even if we could interfere, we're only delaying the inevitable. It's a grim alternative, but we could no longer afford to risk an unveiling of the Mystic Isles to the Northern Realms. To know of us is a danger to the Northern Realms itself. Power, after all, corrupts. No matter how well-intended they may be."

Reina gingerly nodded, accepting her superior's insight. She eyed the sky and frowned upon the dark clouds that hid the stars from her blue gaze.

"The multiplicity of portals to our lands should have been the first thing we ought to have fixed," Tinders added. "That way… maybe the Northern Realms didn't have to suffer from the rule."

"Aye," Cobe nodded.

Reina said nothing, knowing full well of what it meant for her in contrary to her other teammates' sentiments.