There are a lot of mistaken ideas about the devil or Satan tormenting people in hell and hell being the devil's domain. This couldn't be further from the truth. Hell is GOD'S wrath, not the devils!
The image of a red devil with two horns dancing around in hell's fire enjoying himself and delighting in bringing pain and suffering to those who has been sent to hell, is as far from the truth as you can get.
The Bible tell's us that God originally created hell for the devil... but not as a place to live in now, not as a place that is the devils home, so to speak... rather, as the place of ultimate damnation and torment forever.
According to the Bible, the devil is not in hell now. Hell was prepared by God for the devil and his angels and while the Bible speaks of certain fallen angels (demons) being presently locked up in chains of darkness (Tartarus), both the devil and most of his angels are not in hell (Gehenna - Final Hell). This will happen at some date in the future after a final day of judgement
What all this means is that neither the devil nor his angels will be tormenting anyone in hell. The devil and his angels are the ones who will be tormented, not the ones doing the tormenting. You may recall the words of the demons Jesus cast out of the heard of 2,000 pigs when they asked in fear if Jesus had come to torment them before the expected time (ie. after final judgement).
"And when he was come to the other side into the country of the Gergesenes, there met him two possessed with devils, coming out of the tombs, exceeding fierce, so that no man might pass by that way. And, behold, they cried out, saying, What have we to do with thee, Jesus, thou Son of God? art thou come hither to torment us before the time
" (Matthew 8:28-19).