The Honorary Stark [Steve Rogers]
Elaine Rhodes is the ever elusive Goddaughter of tech billionaire Tony Stark- carefully kept away from the limelight so that she could have a normal life- as normal as growing up with Tony Stark could be at any rate.
Unbeknownst to her godfather, Elaine was recruited by S.H.I.E.L.D straight out of High School.
One of her biggest tasks as an adult had been juggling a super-secret spy organization and her incredibly nosy Godfather, and she was quite good at it too...he never suspected a thing- even when she had to leave the country for five years.
A lot happened while she was away for those five years- her Godfather turned into Ironman, turned her father into War Machine, and helped thwart an alien invasion in New York. In doing all this, he had finally come face to face with S.H.I.E.L.D.
Now that Elaine is back in the country, the charade is up, and she has the delightful job of telling her Godfather everything. She was planning on coming clean to Tony- no more secrets- until the presumably dead Phil Coulson contacted her.
(I will try to include as much of the comicverse as possible but I'm no expert)
Note- The pictures and gifs I use in this story don't belong to me!