Jyn Erso was a former criminal girl turned Rebel Spy who was part of the Rogue One Squad, who went to Scarif to steal the Death Star's plans. Yeah, she's pretty much the new Jan Ors.
Growing up, Jyn had a pretty crappy childhood. It's not that her parents were abusive and beat her, oh no, they actually loved her very much and cared for each other a lot. The problem is, ever since the beginnig, many villains had always taken a creepy interest on the Erso family for unknown reasons.