To start Rebecca's route you need to go to the main menu and hit new game, but click see new content or something like that.
damn, this was a new start and took forever to do Asukas route. Alright, start a new game. How do I engage a route with Rebecca?
At least for me it didn't take away the progress of the other routes, but instead added her story to the game. If you click new content it should start with the ability to access Rebecca's route by going to the city.
I’ll give it a try, thanks!
