I guess you should figure out what the goal here is. Do you want her to ultimately be a house pet or would you like her to return to the coop (predator proof of course) ? Maybe you can pair her up with a friend for a while. Do the house chicken thing with both of them. Lock them up in the house early if you're not going to be home before dark. After a while when they've bonded and feel safe with eachother return them both to the coop. I guess I don't know enough about your set up. Maybe lock everyone in the run an hour or so before dark. If they don't go up on their own, put them on the roost. They should get it soon enough. Otherwise, if you go the house chicken route you'll HAVE to put her in the house before you go out if you wont be home before dark.