Y/N is Tony Starks daughter who got severely injured during a hunt with Sam and Dean. She had to be put in a medically induced coma to recover. Tony blames himself for not being a good dad to y/n and he thinks of all the times he blew you off and how he never gave you a childhood and how you stopped calling him dad and started calling him sir instead. (you are good with tech, advanced combat and have ability like Lila from tua). and they finally see the number on your left wrist from when you were kidnapped.