Paul taught that there is a physical 4D body and there is a spirit body. At the Rapture event those in Christ -alive and dead members of the body of Christ believers- will first be given a new glorified physical body of higher dimensional reality, then be gathered up into the clouds to meet the Lord in the air and return to The Father's House. A demon can never have a glorified physical body, so when God remakes the Universe, these demons will be completely ejected yet exist forever in a place so opposite to God's love and Grace that it will be continuous torment.
The glorified body given at the time of the Rapture is superior to the spirit body. The demons want the physical but can only have physical senses if they invade an alive living organism.
A fallen Angel is not the same as a demon. The demons are the disembodied spirits of the Nephilim. The Nephilim were not 'in the image of God' so they cannot ever have reality WITH GOD only away from God and God's Righteousness.
Sorry, meant to include you in the #78 ping
Exactly.