This is set in the marvel comics

You are the old child of Tony, a random woman and his child from a one night stand. Your mother died at birth and due to court reasons he had to take care of you.

He didn't acknowledge you that much in your childhood, and now you're a teen, a super genius at that, but he didn't care, you wanted him to be proud of you like he does with Morgan (and whoever child he made with a one night stand)

You made a suit of iron inspired by his and others' suits, with the resources he doesn't need you made one, a one made of nanotechnology.

That was the day you became Ferric

Months past by being a hero and you've even helped the avengers and next avengers (Henry Pym Jr, son of the wasp and Ant-Man, Azari T'Challa, son of Storm and black panther, Francis Barton, son of Clint Barton, Torunn, daughter of Thor, and James Rogers, son of Natasha Romanoff and Steve Rogers, and maybe you have a crush on one of them... wink wink) but they never knew your actual identity and you never told them, you were a enigma.

This story is now set in after a mission with the next avengers.