Tenori was excited and pissed at the same time. He was excited because he and Izuku, along with their new friends, were going to a special training facility for heroes! Yay! Pissed because Bakugo was annoying him with the constant screeching like a rabid monkey and Tenori was a bit tempted to use the 'neck-breaking' move his grandma had taught him when she was still alive. It was more like crushing the windpipe and doing enough damage to the inside to make it bleed and watch as they choked to death, but he was going to be a hero and heroes didn't do things like that.
Tenori's hero costume looked mostly like everyday clothes – grey and blue sneakers, pants with several pockets on their thighs, a hoodie with additional padding to soften blows and All Bright's insignia on the shoulders, not to forget a mask and goggles set to filter air and keep dust out of his eyes.
He was really happy when he learned that All Might wasn't there. He still wasn't comfortable around the guy, despite everything pointing to him being a good hero and a decent human being. The scars left by No Bright were just too deep.
Uraraka had practically jumped into the atmosphere when she saw 13, activating her quirk by mistake, but thanks to Aizawa's quick reaction she didn't fly off. Everything was going fine until the portal opened up…
Tenori was one of the first to react and warn the others. The villains stepped out and he had to hold back a shudder at the black-skinned hulking figure with exposed brain.
"Wait! Bakugo!" – someone shouts.
Bakugo had rushed forward, explosions going off in his hands.
"That fool!" – Tenori cursed and turned back.
The door was close and their best chances for survival right now were to get out. He ran towards the door and tried to open it but it was jammed, it wouldn't open!
"They are trying to escape!" – a villain with snail-like eyes shouted.
Black smoke surrounded the students and whisked them away before Tenori could even use his Quirk.
=== With Shigaraki ===
Shigaraki scratched his neck furiously, almost drawing blood. His plans were off the rails. All Might wasn't there, a pesky hero was bugging him and those useless goons they hired hadn't even brought the head of a single student back!
"Stupid cannon fodder…"
His eyes scanned the surroundings and spotted a few kids watching from behind some rocks near the pool.
"Gah!" – Aizawa shouted as the nomu broke his arm.
"Aizawa-sensei!" – a green blur jumped out.
"Don't-" – a boy with goggles and a mask.
Shigaraki grinned. In a quick motion, he intercepted the boy's path. The shock on the boy's face was priceless. His hand stretched, ready to clamp around the hero student's neck and disintegrate it. A long tongue shot out and snagged the boy, however. The boy with the hoodie caught the green one without even grunting.
"I guess you should be next."
Shigaraki now aimed at the frog girl. She froze in fear as his hand wrapped around her face and… nothing happened.
"Persistent fool. Nomu, smash his-"
THWAP!
Something hard collided with Shigaraki's face, thankfully Father was not dislodged.
….
Tenori panted as he faced the hand-covered villain. A disturbing sight he didn't expect to see here with this world's villains being… milder, if you could say that.
"Get out of here, Tsu!"
The frog girl nodded and quickly jumped away.
"Wrong choice."
Aizawa had blinked and Shigaraki had used this time to attack. Tenori's mask began to disintegrate under the villain's grasp.
To Tomura's surprise, an almost shockingly strong grip had clamped around his forearm the moment his fingers had touched the shorter boy. His own clothes tearing apart and the pain of his own skin breaking down… Shigaraki let go and managed to wrench his hand out, a bit of blood dripping from the almost hand-shaped injury.
Tenori's mask had all but crumbled, his right cheek hurt a bit, probably injured. His hood had partially slid off but otherwise he was fine.
…..
Shigaraki now had a GOOD look at the boy as he carefully held his forearm. The boy was short, had pale skin, no visible scars… his hair, the shape of the face and the mole – they were all like his! It was almost like he was standing in front of a younger version of himself.
'I-Impossible! This cannot- Is not-' Shigaraki's thoughts swam faster and faster 'A random NPC with his face? A clone?! I don't have any siblings! Were all those "Matrix" theories on the internet real?'
A loud crash stopped everyone in their tracks.
=== A bit earlier ===
All Might sat in Nezu's office, forced by the principal to rest. Said principal sat behind his desk, looking through some papers.
'Shimara Tenori… You, are a mystery. No birth certificates, no previous record of you existed before the Midoriyas took you in. No past, no relatives… The closest thing that came up from all the searching was a file of a missing child but that child should be way over 20 by now. Who are you, really?' – Nezu thought as he sipped from his mug.
"Principal!" Ectoplasm burst through the doors "There's a problem! In USJ!"
=== Returning to the present ===
All Might burst through the doors of USJ, his face showing all the fury he felt inside. Tenori gulped and took a deep breath to calm himself.
'This is NOT No Bright… this IS NOT No Bright…' – the boy chanted until he calmed down a bit.
"NOMU!" Shigaraki growled "Get him! Crush All Might!"
The beast screeched, unceremoniously flinging the injured Aizawa to the side and going after the hero.
"Sensei!" Tenori turned towards Tsuyu and Izuku "One of you move him to a safer place!"
"Watch out!" – Izuku shouted.
The older teen leaned back and escaped a swipe from Tomura. A dark portal opened behind his back but the boy had previous experience fighting a portal user, so he twisted to the side, avoiding the portal by less than a centimeter.
Izuku ran towards his friend while Tsu hopped towards the writhing Aizawa. Tenori took a few steps back, making some distance between himself and the two villains.
"I see you didn't listen to my input when I told you to ask for at least a foldable weapon, Zuku…" – Tenori said but his eyes never truly left his opponents.
In a practiced motion, Tenori quickly swipes his hand over the floor, stone and whatever else was beneath his fingers quickly broke into dust and re-assembled itself into a long staff. He threw it at Izuku.
"Might be a bit heavy but should work. Just don't get caught in their attacks."
Izuku nodded and they advanced forward, together.
…..
All Might was shocked. This Nomu… Whatever his Quirk was, it could match him and withstand most of his hits without even flinching! Further away from him a wall of stone rose from the floor. For a moment, he thought Cementos and the others had arrived but then he saw the Shimara boy on top of it, fighting with someone made of black smoke.
'They youngsters are giving their all… I can't let them down!'
He powered One for All up, increasing the force behind each punch more and more, surpassing 100%! The Nomu couldn't respond on time and was hit relentlessly. With one final punch, the Nomu was sent flying out of the roof.
…
"Impossible! He should have been weak! He should have been defeated! Cheating! He must have cheated!" – Shigaraki scratched his neck furiously.
"Whoah, dude, chill. You'll tear your skin off if you continue." – Tenori remarked.
"Who asked you, fucking bug?!"
"Um… no one?" – Tenori lightly scratched the side of his neck, a nervous tick.
This unnerved Shigaraki even more and seemed to solidify the impression the boy was some sort of copy or screwed up clone of his even more.
All Might turned to look at them but didn't attack the villains.
"Give up! Your subordinates have been defeated. If you struggle, we'll be forced to use force!"
Shigaraki grinned at the No.1 hero.
"Why don't you come then? Don't tell me you are buying time to-"
Bang!
A bullet hit the hand-covered villain in the shoulder.
"We are here!"
Teachers from UA and even a few pro-heroes burst through the doors.
"We surrounded the whole building and cleared all the other zones! You are surrounded!" – Snipe pointed his gun.
"We need to leave." – Kurogiri stepped closer to Shigaraki.
"Don't fuck with me! We were so close- GAH!" - another bullet hit him in the leg.
Kurogiri acted quickly and opened a portal, dragging a thrashing Shigaraki in.
"I WILL KILL YOU!" Shigaraki shouted "You will all fall! You, All Might, that green shit and the damned bug! You all will pay!"
The portal began to close but just before it closed, the hand around Tomura's face slipped off. Izuku and Tenori, the closest people to the portal gasped, the greenette even dropped the half-disintegrated staff he had been desperately clutching with his good hand.
"H-his face…" – Izuku began.
"Yeah…" Tenori said in a serious voice "It's like mine."
=== Hideout ===
Shigaraki bitched as his injuries were patched up.
"That damned green-haired boy! Damn All Might! Damned fucking clone!"
The TV screen flickered.
{A clone? What might you mean by that, Tomura?}
"There was a fucking clone of me there! I have no siblings, so it must have been a clone or a glitch in the system or whatever!"
"What he means to say that during today's attack, we clashed with a young boy, a student, that looked like him and even had a similar Quirk." – Kurogiri filled in.
{Oh? Is that so?}
As All for One listened to the report, his interest was piqued.
=== USJ ===
Recovery Girl tended to all the injured, thankfully there were mostly minor injuries, excluding Izuku's broken fingers, Aizawa's broken arms and cracked ribs and 13's own injury.
"Fool! Do you take your pones for toothpicks?!" – she smacked Izuku on the head.
Tenori stood to the side, watching the scene fondly, All Might, in his skinny form, sat beside him awkwardly.
"Um… about earlier…" – the hero fumbled with his words, not sure what to say exactly.
"Don't worry. I won't tell." – Tenori looked at the cup of hot chocolate he had been given earlier, relishing the aroma.
"Y-you won't?!"
"Yeah, I have acted… inadequately the past lessons we had with you, even before that. I let my own problems cloud my judgement. Don't expect me to get friendly or anything, but you mean a lot to Zuku. You are his mentor, to my displeasure, so I will help. Just remember this – if you hurt Izuku in ANY way, force him to do something he doesn't want to or God forbid, decide to drag him into a vendetta against your brother/nemesis/whatever against his will…" the look on Tenori's face became dangerous "I will make you pay. Got it?"
"Yes."
Tenori sipped the warm drink and relaxed some of the tension in his muscles. Recovery Girl came by, almost making him choke.
"Come closer, I want to look at your cheek."
He obeyed the short nurse and leaned down.
"Hm… I can heal it but it will probably leave a tiny scar-"
"Ah, no thank you for the offer but it is not needed." – Tenori waved one hand while he touched his cheek with the other one.
His injury disappeared without leaving a scar, then he quickly gulped down the hot chocolate and w jogged towards Izuku.
"What's with him acting like this?" – Toshinori wondered out loud.
"Trauma, dear. We spoke a few times and had some counseling but it still is not enough. Like how he is wary of me and terrified of you."
"He didn't seem terrified when he threatened me." – he muttered.
"He was putting up a front. The boy freaked out the first time he heard you were his heroics teacher. Apparently you look like someone that hurt him, a LOT, in the past."
"I see…"
'Shimara Tenori, just who are you?' – All might wondered.