Q. How, in the perfect environment of heaven and constant presence of God, did Satan fall? Eve was deceived by an already fallen Satan and influenced Adam in the book of Genesis. The fall of Satan is complicated to me as he, like Adam, was created perfect and given free will….his fall is a deep mystery to me.
Related to this, and I believe the answer has something to do with free will, does Satan have perfect control over the fallen angels? I.e., are some of them fallen from God and rebels from Satan, and do their own thing in opposition to both God and Satan?
The fall of Satan is indeed a deep mystery, but I share some thoughts about it in this post: Why did God create Satan? In that post I suggest, as you do, that the explanation for Satan’s fall lies in “the radical nature of the freedom that God has endowed each of His intelligent creatures with.”
As for whether some of the fallen angels are rebellious both to God and to Satan, I think they are all generally opposed to God, but that nevertheless there is much chaos and disorder among their ranks, so that they may often work at cross-purposes. God’s kingdom is one of order and harmony. Satan’s sphere is one of disorder and confusion.