My Hero Academia

What if - You died protecting Class 1A?

Your pov. 

"Aizawa... Take the students. Go." 

Multiple pairs of eyes turned towards your small frame, that stood taller than they'd ever seen you. Your stature had changed from the carefree student, to a professional, in a matter of seconds. Shivers ran down their spines, as they watched you step in front of them all, effectively covering them with your body. Some, taken aback, whispered your name, but were ignored. Your voice was monotone, even now. As if you had decided something, and as if it was final. Gone was the nice and sometimes clueless classmate they knew - in front of them stood a full-fledged hero. 

"So it's you... the undercover hero they've placed in my class." 

You smiled at his words, that mirrored your tone, hiding his surprise well. His posture had changed too, at your command. It was tense, ready to fight. If he was not aware of the villains circling around them, he now definetly was. In a way, you felt the need to apologise. It was your job to prevent a situation like this, and now, you couldn't help but feel like you failed them. You didn't want them to see what had to be done now. 

"(Y-y/n)-chan?", Midoriya's voice sounded from further behind you. Confused, scared, surprised. Again you did not dare to look back. You knew you wouldn't be able to do what was neccessary if you did. "What's happening?" 

"Oi, why are you so demanding all of a sudden?!"

"Bakugo.", Aizawa's voice warned. "Stand back." He readied himself, looking at your back now. "Where?" 

"Around us. On your right is an opening, use it. I do not wish for them to see this." 

You felt how he gripped his capture scarf tighter, the air your messenger for every movement around you. The villains had not noticed it yet. You took a deep breath, preparing yourself. You had revealed yourself. From the folders he'd been given about your true quirk and your abilities, he knew what you would do. It was obvious that he didn't like it. You had to raise your voice again, to get him to move. 

"Go. Now." 

For a moment, it was quiet. His hold on his weapon loosened, his voice almost tender. "I am sorry."

A bitter smile curved up your lips. "Me too." 

Every single one of his students felt the tension that rose from this single conversation, from the few words you had exchanged. Aizawa was ready to pounce at any noise that followed his group,  though he rationally knew that you wouldn't leave any danger to them alive. It was pure instinct,  years of experience that made him almost skittish to entrust everything to you, and the knowledge of what it would do to you. He grit his teeth to prevent himself from cursing out loud, deciding to focus on their escape. He hated it. Every part of it. 

"What's happening?", asked one of the students he'd sworn to protect, that you had sworn to protect when you accepted this stupid mission. You might be a professional that didn't need a teacher anymore, but he couldn't help and feel responsible for your decision. You outranked him, he'd been explained, and in a situation like this, you would make yourself known. He looked around again. 

"Villains. Too many to defeat without casualties, if I did it alone." 

"But why are we leaving (Y/n) behind?" 

Again, he felt the need to turn around, to stop you from this madness you were about to commit. He couldn't. Instead, he silently cussed himself out for not suspecting you for the role earlier. Could he have stopped you then? "(Y/n) is a pro that's been undercover in case of an emergency. You might know her as (hero-name)." 

Gasps at the mention of your heroic identity, the one hero that had succeeded in keeping everything about herself from the public. No one had figured out your age, your eye- or haircolour, your height or skin colour, making it easy for you to basically infiltrate UA. The handfull of people that knew had been sworn to utmost secrecy, and your way of keeping a low profile by acting behind the scenes had made you a mystery for the public and press. Even your quirk had not been announced to the public, making many question your very existence. Aizawa, however, knew from the files he'd been given. A curse more than a blessing, he realised early on. 

"She's real?!" 

"But what's her quirk then? She never specified!" 

"For good reasons.", he murmured, looking back. His walk became faster. "Hurry. We need to get out of the danger zone." 

If anyone would have asked you to tell them your fondest memories, you gladly would have answered them. For once in your life, you would have been able to state moments and dates, in some cases even the time they happened. You were prepared for what was to come, and felt a forced kind of peace about it. Your eyes shut, you thought back to the time you had been the simple hero in training, the student of 1A from the famous UA. The time you moved into the dorms with the rest of your class, the moments spend in that cozy, safe haven you built yourself. The life you knew would some day end with a bang, no matter how fond you would grow to it. In your head you thought back to the many, many memories you had made in 1A. 

The time you had passed Aizawas tests, and got to know your classmates... 

The morning you had been introduced to All Might as your hero teacher...

The day you made friends with Izuku, Katsuki and their respective friend groups...

The one time you brought a stray cat back to the dorms, and got scolded by Aizawa for it... (He adopted it right after. Somehow you still chuckle about it, especially since you already knew he wouldn't leave the poor kitten out on the streets.)

The evening you and the class got take-out after a very intense training with Aizawa... 

The first lesson with Present Mic, where you surprised everyone with your english skills... 

It had been a fun time, you concluded. A time you would forever hold dear in your heart. You tried to keep these pictures in mind, when you finally, once and for all, activated your quirk's full power. 

Aizawa felt how much his gaze showed his worry, and sadness, as he kept it towards the place they left you behind. His, and in a way your, students, behind him, he felt how inevitable your look had been deep in his core, and how much it really affected him. He had tried so hard not to get attached. Had tried to forget that one of his students would leave him, earlier than anyone would ever want, had hoped he would not have to face what was about to come. He remembered the letter, written on a computer, that you had decided to put into the folder. His eyes became watery. 

Dear Aizawa-san, 

I can only imagine how you must feel with the knowledge that with me, one of your students will die, before even graduating. I can only ask for your forgiveness, and hope that maybe, you understand why I must do this. 

You see, I am not from your reality. I am from a different time and place, where your story, and your student's, is just that. A story. Never in my wildest dreams would I have dared to believe that the lot of you are real, and even when I saw what happened on the screen, I felt the wish to change it, to change the outcome. And since you are reading this, I can proudly say that I succeeded. I was able to prevent a lot of trauma, only to expose you to another one... For that, I am sorry. But what I saw, would have been worse than just my death. And whatever it takes... I will do it to stop it.

I already died once. I can do it again. 

Please don't hold yourself responsible for what I will have to do when the time comes. Instead, should we have formed a bond, be proud that I prevented so much suffering... Because I am. I know that it's the right thing to do. And that's what makes a hero, doesn't it? To do what is right, no matter what... 

I am sorry for the pain I will cause you and the rest of your students. Maybe, some day, you can tell them that for me. 

Thank you for everything, Aizawa. 

(Hero name)

The explosion from where you stood was bigger than anything he'd ever seen. His heart clenched helplessly, as he fought the urge to run to you. A column that reached into the sky swallowed your form, taking the price for stopping the villains on your own. It was quiet, now, that the rest of the class understood what had happened. 

You were gone. Forever. 

Whatever it takes...