Can demons return to the person whom they left?
Yes, but this is mostly a concern for non-believers who have undergone a deliverance, and haven’t accepted Jesus yet. Jesus warns the ‘wicked generation’ (sinners) that the demon can return with 7 even worse demons. If you are a believer though, and your deliverance has been complete (all the demons kicked out and legal rights have been broken), then this isn’t a concern to you. However, if you go back and re-open the door(s) that let the demon in, you are re-welcoming him back in. But if we don’t go back and re-punch that hole in our hedge again, we don’t have have to go around worrying about it returning.