You are Endeavors only daughter and Endeavor doesn't really talk or pay attention to you except when he wants you to watch over todoroki and Natsuo the two youngest, your the oldest sibling and when ever he needs something from you

Endeavor walks up to you

Endeavor:"I need you to watch over todoroki and Natsuo"

in this todoroki is 5 and Natsuo is 9 and your 15