Y/N is Bucks 15 year old daughter. She lives at the avengers tower with buck and the others were all like a big happy family. A building collapses on buck during a mission and he dies at the scene. Y/N is at school when it happens unaware until everyones phones begin to ping telling everyone about his death. pepper tony Sam and Steve comes to pick her up from school causing a huge commotion as no one knows that Y/N is bucks daughter and knows let alone lives with the avengers.