Karma

Luna Sun is a young orphan girl with a very mysterious past. No one knows where she came from and no one really cares.
Tony Stark, during one of his campaign acts, adopts Luna. But soon forgets all about her.
A couple years and an alien invasion later and Tony Stark is being interviewed. During the interview he is questioned about his adoptive daughter. He plays it off as if he knows everything about her. But after the interview he is wracked with guilt and tries to find her.
Meanwhile Luna has long since given up hope of her adoptive father coming to get her and has instead put all of her pent up frustrations in being the semi-newest superhero, Karma. So when Iron-Man, who she soon finds out to be her adoptive dad, bursts through her roof, you can guess she's less than thrilled.
Follow her as she tries to keep her identity a secret as she is forced to move into Stark Tower, changes schools, and is constantly hounded by S.H.I.E.L.D. when she's Karma.

I don't own Marvel characters.