Childhood Friend (Deku x Y/n)

You are the adoptive sister of Todoroki since 2. You both have similar quirks so endeavor thinks of you both as his "Master Pieces". You and Todoroki were inseparable. Then, you both meet Bakugou and Midoriya at the age of 5. You all had the best relationship together, even had nicknames for each other. One day, you and Todoroki moved to a different neighborhood (Todoroki's current one). One day Todoroki Goes to U.A and then a couple weeks later you join in, and neither bakugo nor Midoriya remember you and your brother(Todoroki). You and Todoroki also don't remember them.(This is where the story starts)