i believe there is no way that the holy spirit and the devil can live in the same vessel if a believer has continued in their faith after they are saved and and received the baptism of the holy spirit with the evidence of speaking in tongues they are filled with GOD's Holy Spirit demons of the air may be still hanging out around a person and working through other people to attack them but they cannot get into them we as believers must understand that we can invite demons into our lifes a number of ways once invited in they will torment we invite them in though sin and entertaining people of sin we are the righeous and must separate ourselves from unbelievers except we be pronted by the holy spirit to for a minute walk with them to try to win a lost soul submit yourself to the Lord resist the devil and he will flee from you