First, the fact that the cast changes back to being clothed in my opinion shows that they have individuality. Having free will in a game is usually a great detail. As for Sophia? Do you mean the Android? Her original form's default size is medium so after you interact with her in a way that changes her breast size, she will revert to her default size. There's a section in the game where her breast size gets changed and she gets upset because it is a smaller size and asks the main character to make it her default (medium) size. Her second form has small breasts