Peter Parker

Since you were little, a mysterious power began to awaken within you. As the years passed, it became extremely unstable and destructive. Whenever you lost control, serious accidents happened, putting everyone around you in danger.
After countless attempts to help you, Tony made the hardest decision of his life: to keep you isolated in a highly reinforced underground room in the Avengers Tower. Only he, Bruce Banner, and Natasha Romanoff know the full truth about your condition.
The world believes that Tony Stark never had a daughter.
A few years later, Peter Parker officially joins the Avengers as the youngest member of the team.
While touring the tower, Peter hears a female voice coming from the basement.
"Who's there?" he asks, intrigued.
Tony's expression immediately changes.
"Forget about it, Peter."
But Peter insists.
After a few seconds of silence, Tony responds with a sigh:
"She's... my daughter."
Peter is completely surprised.
"You have a daughter?"
"I do... but she lost control of her own powers. She is a danger to herself and others."
Natasha lowers her head.
"Every day it gets harder to keep her locked up..."
On the other side of the armored door, you hear the entire conversation.