Most important aspect to keeping them confined at first is to 'home' them to the new environment.One caveat to that. I don't see any fences. I don't know what she will do at night. She might follow the others into the coop or she might sleep in a tree were she could be really hard to catch. In that case I'd house her in a cage or crate inside that open area of the coop for a couple of days and nights to give her the idea that coop is a safe place to spend the night. You'd get some advantage form the see but don't touch, but I'd still expect some violence when you first let her out to play with the others.