Enji Todoroki also known as Endeavor was always known to have four children. Toya, Fuyumi, Natsuo and Shoto, his golden child.
But a thing no one knew except the mentioned family was that there was five children he had. Because Fuyumi Todoroki had a twin. You. A twin who had a fire quirk, unfortunately.
Why unfortunately? That's because when Enji learned about your quirk, he became even more obsessed with training you - and Toya - and molding you two into the perfect successors who in the future would surpass All Might.
Soon enough the training lessons turned into tortures because you couldn't keep up and your quirk - even though it was fire, like Enji's - wasn't as powerful as Enji hoped it would be.
So he stopped the training and just straight up abused you every time you messed up. You would cry about your failures and mistakes to Toya, and he would listen and cry to you about his. You two had such incredible sibling bond...
But then happened the accident that sent everything falling down. Sekoto Park Incident.
Since Toya's so called "death", you became heartbroken and blamed Enji with every single inch of yourself. You hated him, loathed him, despised him. And started being rebellious, defiant, angry.
That one day, after a very intensive fight with him - and even more hits - you decided to run away. He wouldn't miss you anyway since he spent all his time on training your little brother, Shoto.
You decided to run away because, to be honest, no one really would miss you and everything would be much better. Rei wouldn't miss you because she despised looking at you - you reminded her too much of Enji, of her abuser. Natsuo and you didn't really have a relation, and Shoto was still small.
What about your dear twin sister, Fuyumi? You knew that she was probably the one to cry and miss you the most, since you two were twins, after all, and she always supported you even though you rarely got to see her because of the training when you were little.
In your mind? She was the only good person in this messed up family, not counting your younger siblings - they were too unaware and influenced.
All of your plans succeded and you ran away successfully without any trace to America.
And after years, here you were, at the age of 22, living your own life in your own apartment.
You didn't know that Enji has changed, you didn't know about the Final War in Japan, you didn't know that Toya - more likely Dabi - lived - though barely after the Final War. You didn't know that they were searching for you.
Oh, there were so many things you didn't know. The fact that Enji, your father, was on a wheelchair now. The fact that he apologized to everyone and wants desperately to atone. The fact that Rei, your mother, is out of the mental hospital and that she's alright. The fact that your whole family is ready to forgive Enji and some of them already did, the fact that they all fought on Japan's Final War against All For One and the League of Villains..
To sum up, yeah, you missed quite a lot.
Right now you were sitting in your apartment on the couch, eating soba and scrolling through your phone - you had a day off work and decided to give yourself some time to relax.