Primarily, Satan (Lucifer) and a third of the angels rebelled against God, leading to their expulsion from heaven into the world (or hell/the abyss) due to pride and defiance, as described in Christian and Jewish traditions. In Islamic tradition, Adam and Eve (Hawwa) were removed from Paradise (Jannah) and sent to Earth as a consequence of disobeying God's command not to eat from a specific tree.
Satan and his angels rebelled against God in heaven, and proudly presumed to try their strength with his. And when God, by his almighty power, overcame the strength of Satan, and sent him like lightning from heaven to hell with all his army; Satan still hoped to get the victory by subtlety[.]
Lucifer was not satisfied with worshiping God; instead, he wanted to be worshiped. Once a beautiful, powerful angel of God, he lost his former, exalted position in Heaven. “How you are fallen from heaven, O Lucifer, son of the morning!
The Bible does not give us an exact number of fallen angels. The number of evil angels is not disclosed to us in Scripture. Some biblical scholars postulate that there are at least four thousands of fallen angels. Others believe the number to be 10s of thousands of fallen angels.
Satan was cast out of heaven because of his prideful rebellion against God and his direct challenge to God's character and law. His desire to elevate himself above the Most High and his attempts to undermine divine authority led to his expulsion and set in motion a cosmic conflict that continues to affect humanity.
In addition to Enoch, the Book of Jubilees (7:21–25) also states that ridding the Earth of these Nephilim was one of God's purposes for flooding the Earth in Noah's time. These works describe the Nephilim as being evil giants.
Christian theology teaches that the sins of fallen angels occur before the beginning of human history. Accordingly, fallen angels became identified with those led by Lucifer in rebellion against God, also equated with demons.
Because they identify Michael with Jesus, he is therefore considered the first and greatest of all God's heavenly sons, God's chief messenger, who takes the lead in vindicating God's sovereignty, sanctifying his name, fighting the wicked forces of Satan and protecting God's covenant people on earth.
Baraqiel (Imperial Aramaic: 𐡁𐡓𐡒𐡀𐡋; Aramaic: ברקאל; Greek: Βαρακιήλ, Βαρακήλ) was the 9th watcher of the 20 leaders of the 200 fallen angels that are mentioned in an ancient work called the Book of Enoch.
Qazwini describes an angelic hierarchy in his Aja'ib al-makhluqat with Ruh on the head of all angels, surrounded by the four archangelic cherubim.
In the Hebrew Bible, there are two figures – Enoch and Elijah – who are said to have entered heaven alive, but both wordings are subject of debate. Genesis 5:24 says "Enoch walked with God; then he was no more, for God took him," but it does not state whether he was alive or dead nor where God took him.
Fallen angels, however, can appear in physical form and even interact with mankind. In Genesis fallen angels even procreated with women.
One example from the Bible is Stephen, who was the first person to be killed for his faith in Christ. The Bible says that as he was being stoned to death, God gave him a glimpse of Heaven's glory. He declared, “I see heaven open and the Son of Man standing at the right hand of God” (Acts 7:56).
Satan's sin—and that of the other self-proclaimed "gods"—was that of "being lifted up with pride . . . the condemnation of the devil" (1 Timothy 3:6). But they shall all, with him, eventually "be brought down to hell" and the "everlasting fire, prepared for the devil and his angels" (Matthew 25:41).
Even in the present Heaven, prior to the Resurrection, people cannot sin, for they are “the spirits of the righteous made perfect” (Hebrews 12:23). Ultimately, we'll be raised “incorruptible” (1 Corinthians 15:52, NKJV). Incorruptible is a stronger word than uncorrupted.
In LaVeyan Satanism, Lucifer is described by The Satanic Bible as one of the four crown princes of hell, particularly that of the East, the "lord of the air", and is called the bringer of light, the morning star, intellectualism, and enlightenment.
Winged warrior Lysander has been alive for centuries, and yet he's never knowndesire—until he meets Bianka. Spawned from the bloodline of his enemy, the beautiful butdeadly Harpy is determined to lead the untouched Lysander into temptation.
St. Michael the Archangel is synonymous with spiritual warfare and defeating the ultimate enemy of God and the human race – the devil. In the Book of Revelation 12:7-9, St. Michael battles Satan in heaven and eventually casts him and his demons into hell.
Ever since Adam, the very first human being, died, God has assigned his highest-ranking angel--Michael--to escort human souls to heaven, say believers.
It is true that we believe that angels do not have gender. Angels unlike human beings are pure spirit. This is why when people say that a human being has become an angel in heaven that is incorrect. Any human being in heaven is a saint.
St Michael the Archangel is a biblical character whose name means "Who is like God?" in Hebrew. He is the leader of the heavenly hosts and is often depicted as an angelic warrior fighting evil and protecting the faithful.
So Satan, not his original name. The Bible suggests that Lucifer was Satan's name when he was an angel before he defied God and chased from heaven. However, the name Lucifer has only been used once in the Bible in the Book of Isaiah 14:12.
Biblically, Angels, whether heavenly or fallen have no gender. They are mentioned as Spirits of authority, in reference to God being called a "He/Authority". In context scripturally, "God/Spirit" doesn't have a gender either.
The whole earth has been corrupted through the works that were taught by Azazel: to him ascribe all sin. According to the Book of Enoch, Azazel (here spelled 'ăzā'zyēl) was one of the chief Grigori, a group of fallen angels who married women.