Speaking of Christians, absolutely not...The Holy Spirit lives in each Christian. There is no way Satan and the Holy Spirit will ever inhabit the same body...no way. Only the unsaved can be possessed. Trapper, where in the world do you get your theology? Some of your understanding is right on and some is way out there. I suggest you read the Bible slowly and ask God to teach you His ways. He will do just that. Anyone that seeks the truth will find it.
This is getting old and running on and on. Good night and may God's mercies and grace show in you!