MHA/BNHA react to For The Want of A Nail by Clouds part 1

Izuku rubbed his eyes as he stared at the screen of his laptop. As tired as he was, he knew he wouldn't be able to sleep until he knew Eraser was alright, and besides, he needed to do something to distract him from his overwhelming anger. He glanced over at his teacher, unconscious on the hospital bed as Joke dozed off in the hard plastic chair pushed against the wall. He should probably offer her the couch, but then he'd have to wake her up and she might not be able to fall asleep again.

Joke: Oh that's so sweet of him.

Izuku itched at the bandage on his forearm. Recovery Girl had said he was lucky the disintegration hadn't gotten to the bone, so he'd escape with just a scar, but even with her quirk, it would still take a few days to heal completely. He shook his head and picked up his notebook. Information on the villains they'd arrested was easy to find, but that wasn't what Izuku was interested in right now. What he wanted was info on Shigaraki, Kurogiri, and the one they'd called Sensei.

Kurogiri: And he's looking into us...

Dabi: Welp, that's not good.

So far, Izuku didn't have much. He knew a lot about Shigaraki's quirk and how it worked, but that was only because he'd seen it in person. Even after Tsukauchi gave him access to the government's quirk files, Izuku couldn't find any record of a person with Shigaraki's quirk. At least, not one that was alive. There had been a woman with a nearly identical quirk, but she'd died nearly 50 years ago.

Shigaraki: Sensei must've scrubbed the records of me I guess.

Kurogiri's quirk was even worse. Izuku only saw Warp Gate being used a few times, so didn't get the chance to really see what weaknesses and limitations it had. Did Kurogiri have to be able to see where he was warping? Did he have to have been there? Was there any limit, however large, to the size of his warp gates? After what he found on Shigaraki's quirk, Izuku broadened his search to any warp quirks recorded since the dawn of quirks on a hunch, just in case Warp Gate wasn't the quirk Kourogiri had been born with but nada. Sure, there were some other warp quirks, but none of those exactly matched what he'd seen. It was so frustrating!

Gran Torino: Just take a break, Midoriya.

And it all came back to Sensei. Izuku sighed and started combing through online forums, looking for any mention of a man who could give and take quirks. A couple people mentioned someone called All for One, but they were always shot down pretty quick because All for One was a legend, a boogeyman. He couldn't be a real person.

Could he?

Tsukauchi: Unfortunately...

All Might: He is.

Izuku made a note and decided to look deeper into All for One. There were stories about him going back for years, even centuries. Izuku had originally thought that was because he was a legend created around the dawn of quirks, but if he were real... well, he could be dead, or he could have a longevity quirk, or All for One could be an inheritable quirk like All Might's and the name just fell to whoever had the quirk. There were just too many options.

Spinner: Okay he guessed the real answer pretty quickly... at least he's not sure it's right?

Compress: At least.

He decided to start by researching the earliest references first. That way, even if it was a different person with the same quirk or claiming to have that quirk, Izuku would still be able to understand the history. There were lots of stories from around the dawn of quirks, but many of them had to have been exaggerated. It was easy to see where the legends came from. Superpowers had still been so new then that not many people knew how they worked. Being quirkless seemed normal at that point, so some people with quirks didn't want them, but others wanted the power that came with having superhuman abilities. A man who could give and take quirks must have seemed like a miracle worker in that environment.