"Wait….WHAT?!" The original Duple's eyes bulged as he looked over to the mysterious Splixson, jaw dropping. "Wait… Don't tell me.."

"Master…..Nana….Is that you?" The blonde question, apparently completely deaf to his successor as he walked forward on shaky legs.

"Toshinori… Toshinori what's going on?!" She asked as she looked at her arms, and down at her feet. "Why am I here? What am I?! Wait…."

Suddenly the confused woman bolted forward, leaping at the skinny man and grabbing him by the shirt, eyes full of fear. "Toshinori what happened with All for One?!"

"Nana… hey come on…" The man said, doing his best calming voice he could while placing his hands on her shoulders. "Deep breathes, in and out. Like you taught me."

"R-right… in and out…" The Splixson nodded, doing just that as she tried to calm herself down. "In….and out…. In… and out."

"Uh…Anyone want to explain what in the heck Is happening here?" Midoriya asked reminding them he was still here and drawing their attention. "Nezu?"

"I'm afraid I have no idea, Midoriya." The bear-mouse-hybrid shrugged looking between the mystery woman and All Might.

"Ok.. one question at a time!" All Might announced with a groan, standing up. "And.. before anything else, introductions. Nana, I know you never met but I told you about Nezu right?"

"The new principal at U.A? Right?" She asked cocking her head to the side as she looked down at him and the principal frowned.

"I am the principal yes but I'm hardly new, no not even slightly new."

"Yeah… He's been at it for seven years now." The blonde said scratching the back of his neck and causing the woman to whirl around, to face him

"S-seven years?!" She repeated incredulously as her eyes widened. "How?! I was fighting All for One just a moment ago. This can't be…."

"Nana…. You died." The man said, looking away and Midoriya felt his stomach sink. 'Crap, now I'm a necromancer?! And a cloner?! Fuck it universe why don't you just turn me into a sandwich next, makes about as much sense as everything else so far!'

Honestly for the briefest moments he worried the Omnitrix would somehow turn him into a sandwich.

"I… died?" Nana questioned, before taking a deep breathe. "Ok… don't freak out. Don't freak out, don't fre- HOW THE HELL IS THIS HAPPENING?!"

"Nana, calm down. I promise if you stop freaking out we can explain, at least with a theory. We don't have much time to though so please, let us talk." All Might explained to her and she nodded, clearly still freaked out. "Yes, it's been seven years. You lost that fight but… I won it a while after."

"Y-you did…?" The woman asked in shock, before she smiled for the first time throughout this whole debacle as she wrapped her rubbery limbs around the man. "That's my boy! I know I was right to choose you as my successor."

"Speaking of succesors…Midoriya?" The man called over and the green alien teen walked forward, rubbing his arm and waving nervously. "Nana, like you just heard is my mentor… and Midoriya here… he's my successor."

"He's…. he…. Oh…. Oh wow." The woman said, in an almost stunned silence. There was silence for a moment as she walked up to him. "Um… Hi Midoriya… nice to meet you. I'm uh… I'm Nana…"

"I heard." Midoriya said with a smile as he shook her hand, being surprised when the woman suddenly pulled him into a tight hug. "Uh… o-okay we're hugging now."

"Sorry about her, she always got emotional at the idea of having grandchildren and I guess this is the closest she has." All Might explained, while Midoriya awkwardly wrapped his own arms around her before she finally let go. "Now, there are multiple elephants to address in this room-"

"Like the fact we're not in a room." Nezu interrupted with a chuckle, getting a groan out of the blonde.

"Midoriya, my boy I'm sure you are confused about some of the things my mentor has said but we can always talk later so we'll address that then ok?" The man asked, and the green clad Splixson nodded. "Now then… Nana. You should know that Midoriya doesn't have a quirk, nor does he look like this normally."

At that, the mystery woman's eyes lit up as she turned to her successor, who along with comments from Midoriya explained his… unique situation. She had freaked out a little at the revelation aliens existed and she was currently one of them but it hadn't been as bad as before now she had time to adjust.

"Now… I have a theory on why you came back." All Might announced, drawing everyone's attention. "Midoriya's Omnitrix had a weird way of… handling one for all. It seems it's locked most of the potential away to alternative forms to keep him safe, meaning he can only reach a safety limit in human form as I understand it. However there was an error when One for All met the… Splixson DNA, is it? Well… Midoriya you already had a cloning alien right? What's different."

"Yeah…The difference is just that, well typically Reverb is better. Don't tell JJ I said that but, Splixsons split personality and feel shared pain while Reverb is a completely unified person…ality….oh! OH!"

"Yes, exactly my boy. I think, due to One for All enhancing one's natural abilities and a part of this aliens abilities splitting personalities it has tried to bolster that trait and in the process, essentially revived my mentor to do so. Presumably, if you were to it again I could only presume my master's master would come out and so on and so forth."

"That's… insane." Nana said with a frown, sitting down. "I can't believe it… just…. Holy crap."

"I'd also presume your power has split between you, so Nana can hold half of One for All and you can hold the other, my boy." Toshinori explained, rubbing his neck. Midoriya nodded, understanding that.

"Well…." Shaking her head the woman forced a shaky smile as she turned to them all. "Can I at least see what Midoriya actually looks like?"

"Oh! Of course, just give me a moment." All Might said, pulling out his phone and opening his gallery. "I still have the before and after pics I took during our training."

"I thought I asked you to delete those." Midoriya said with a frown and the skinny man laughed.

"Guess I'm sentimental." He gave as his excuse, making the transformed teen roll his eyes.

BEEP. BEEP. BEEP.

Everone's eyes widened at that noise as the Omnitrix symbol of Midoriya's chest began to flash. Immediately the boy turned to the woman who had a befuddled expression on her face as the boy grabbed her panicked. "Ah! Quick, we have to fuse again!"

"Huh?! How?! Why?!"

"Just focus, imagine doing it!" The boy said quickly, voice worried and the woman closed her eyes to do so, glowing yellow before she was pulled back into the boy and a green flash engulfed them.

BWOO.

Midoriya fell forward with a gasp, slowly pushing himself up and looking to Toshinori who just stood still, looking at the spot where his mentor had been. He didn't even get to say goodbye.

"I'm…I'm sorry… I just… I didn't want to risk it." The greenette said through gasps, surprisingly tired. He guessed using One for All in alien form would still be taxing, just in a much different way.

"N-no you… you made the right call Midoriya.. I don't think It would have ended well." The blonde explained, voice coming It more broken than before as he turned away.

"All Might?..."

"Sorry it's just… She always taught me to smile, no matter what. For her to be so shaken she couldn't…. I can't even begin to imagine how scared she really was."

At that, Midoriya frowned, before walking over and wrapping the man in a hug. The blonde didn't try to fight it.

"Um…not to interrupt such a heartfelt moment but… mister Midoriya… did I hear you right? You mentioned nothing off increased strength or durability when you talked about that form…"

"Uh yeah…why?" The boy asked, confused as he let go of his mentor and turned to the principal. Then it hit him. "Oh crap… I went full power there…"

"Wait, yeah you did! How weren't you injured?!" The skinny man wondered himself, suddenly pulling the boy back to examine him.

"I mean my arm hurt but…. I don't know…" Midoriya frowned, when a new voice spoke up.

"It might be because we have a rubber like body. It's maybe not a lot more durable than a human body but it's enough to maybe ward off any serious injury you might have gotten." A feminine voice explained and the remaining group turned to see JJ standing there nervously. "Hi….I got worried when I realized you'd sneaked off so I came to find you…"

"Uh…my boy?" Toshinori questioned, looking to his successor. "What do we do now?"

'Aren't you supposed to be the one who tells me what to do?'

"….We tell her the truth. JJ should know, especially if she's going to be living with me and my mom anyways." The teen said as he walked forward.

Somehow he felt like the explanations would never end… and through them all he eventually forgot to ask…

Who is All for One?

The rest of the week had been dedicated to getting Midoriya used to One for All in human form after school. JJ had begun to join their training sessions while Nezu started to show up to them less as they trained.

When the alien girl had heard about the power she had been completely supportive, promising to help in whatever way she could to get Midoriya to improve.

It was rare the boy got a break from the training either as All Might wanted him prepared for the sports festival which only gave them a week and a half, and seeing as Midoriya only had 3% of the power to work with.

His first test, the day after the Nana debacle had been to punch a tree at full power. It ended up splitting and almost toppling on him. After that they had tested his running speed and jumping height.

Overall, three percent was nothing compared to All Might's one hundred percent as expected but it was still quite the step up from being quirkless, as he barely but definitely reached at the very least what an absolute peak physical human could.

His punches could likely at least match up to Kirishima's hardened ones and he could ran maybe about a quarter as fast as Iida could. His agility also seemed to gain something of an increase, as well allowing him to leap up into the branches of tree's with a little effort.

Still, overall Midoriya had a feeling he'd be relying on his aliens over the power for a while to come. It was nice to finally have the option to fight back though, which had actually given him an idea.

He hadn't told even All Might about it, only talking with Nezu to confirm it would be ok and JJ to get the necessary items for it before sending a request to the support department. He had a feeling it wouldn't be finished until after the sports festival but that was ok.

One thing Midoriya had wanted to try again, but the blonde had vetoed was using Duple again. The man simply needed more time before he could go through that again.

Somewhere in the back of the greenette's mind he thought it would only make it harder but he had respected the man's wishes and eventually, the day of the festival had arrived.

Class 1-A had arrived early and gotten changed at the school before being ushered to the waiting rooms inside the stadium as people crowded in to get seats.

That's where they all sat waiting now to be called, just trying to psyche themselves up. Midoriya had just been in the middle of talking with Yaomomo about how they were feeling about the day to come when Todoroki of all people walked up to the boy.

"Midoriya…"

"Huh… Oh hey Todoroki, what's up?" The boy asked confused as he turned to him, and his confusion only grew as the heterochromatic teen glared at him.

"Objectively speaking, you may be the weakest member of our class. Yet also the strongest. What is for sure is that you're versatile, and have something of an advantage over everyone here. You might already be expecting some people to target you but I want you to know, I will beat you."

Confusion turned to anger.

"W-woah, hey now Todoroki." Kirishima came in, trying to keep the situation from escalating, clearly nervous. "We're all classmates, no need to go declaring war…"

"No… he's right." Midoriya said simply, standing up. "I do have an unfair advantage, even I'll concede that much. Why it means you have to single me out, I don't know but..."

The boy looked up with a glare of his own, fire in his eyes. "If you single me out without regard, then the only thing I can promise you is I won't play fair. If you try to pick on me alone, I will deliver everything I have to you."

Silence overtook the room as an unsuspected air of unease hit the room. As well as a slight fear, as they all know Midoriya wasn't kidding.

"Just so you know… I'm only warning you to be fair."

Then, they got the clear to leave out onto the field, the heterochromatic teen not bothering to look back.

Midoriya could tell. Todoroki didn't regret his declaration in the slightest.