Why not make it where she can no longer discuss the tulpa or Harry Potter if she doesn't want to be banned, but she is free and welcome to discuss the gospel, God's love, being a new creation in Christ, etc. as long as she doesn't bring these other things into it. "Consequently, faith comes from hearing the message, and the message is heard through the word about Christ" (Romans 10:17). If we really love her, which I do, we want her to hear the bible. She has been open to AllieWi in this with Allie giving her bible verses. If Polly won't agree to this, then I guess you have your answer.