Mercy Gracelynn Swanson is Jesse's shy little sister. She is a shy and tomboy girl who got bullied at her school. She was smart enough to move up into college with her brother.
Elsa was special she knew that. Tony Stark had adopted her when she was three years old and she found out about her powers at sixteen. By trying to control herself in school she was branded as a freak. But what was the point? When she was recruited by SHIELD she felt like she was included in something for once in her life. And then she met the captain. A man who was as much an outcast as she was but for many different reasons. Perhaps this was what made them all in love.