Satan is not hostile toward humans who have died and become saints. Satan's entire interest is to entice people away from God. Satan has no interest in antagonizing the residents of heaven. Further, satan was always careful not to interfere with the Holy Family (Jesus, Mary and Joseph) and the true Apostles. We know this because evidence to the contrary would have been documented as the Holy Spirit would have revealed such meddling as, for example, the betrayal of Judas.
Further, as the Bible documents, satan is courteous and not antagonistic when he converses with God. Satan is not interested in a fight with holy people who were in Jesus' direct circle when he walked the earth, nor with people who have died and gone to heaven.
Satan is not antagonistic in particular to the Blessed Virgin Mary. Satan recognized her as the pure vessel created by God to receive Jesus. As such she had no "hooks" of "survival instinct" by which he could, even if he wanted to, attempt manipulation or combat because Mary was and is entirely within God's will.
Mary combats satan on behalf of individual living children of God only within their individual hearts, person by person, as she is the mother of all. There is no orchestrated conflict between them on an earthy or celestial basis. If satan were not tempting and spreading heresy there would be no conflict. Mary combats satan through information and directing people toward God's grace. For example, Mary showed a glimpse of hell to the children at Fatima. Mary is the antidote to despair and heresy, which are tools of satan. But satan and Mary are not in a state of combat.
Idiots who are under the control of satan or are puffed up thinking they are satan or satan reincarnated probably think otherwise as they smoke weed and try to read the "battle scenes" in the Bible.
(The scene in Revelation where the dragon chases the pregnant woman clothed with the sun is not indicative of combat and hostility between satan and Mary. It is 1) a re-summary of the birth and kingship of Jesus and 2) prophesy of abortion because Mary represents the mother of all children. We know this because the dragon wants to eat the baby and also his tail sweeps away one third of the stars. Look into how many abortions are taking place and what percentage of pregnancies end in abortion and you'll see what the tail sweeping away one third of the stars means. For example it is estimated that one-fourth of Afro-American babies have been aborted. Some other demographics have probably met or exceeded the prophesied one-third. So the stars the dragon sweeps with his tail are unborn aborted souls. Wake up people).