Question
What does the Bible say about angels? (what they are, the named angels, and their roles)
Analysis
What they are and what they do
Angels are created (Colossians 1:16), do not marry (Matthew 22:30), and are numbered as a vast host, 'thousands upon thousands' (Daniel 7:10; Revelation 5:11). Their tasks in Scripture include announcing God's messages (Luke 2:10–Luke 2:14), protecting God's people (Psalms 91:11; Daniel 6:22), strengthening (an angel strengthens Jesus in Gethsemane, Luke 22:43), and executing judgment (Acts 12:23; Revelation 8–Revelation 9). Jesus taught that they rejoice when a sinner repents (Luke 15:10).
Named angels and special orders
Michael appears as a warrior-protector, he contends for God's people and leads heaven's armies against the dragon (Daniel 12:1; Revelation 12:7). Gabriel appears as an interpreter and announcer (Daniel 9:21; Luke 1:19). The cherubim guard God's holiness, stationed at Eden's gate (Genesis 3:24) and overshadowing the ark (Exodus 25:18–Exodus 25:20); the seraphim ('burning ones') cry 'Holy, holy, holy' around God's throne (Isaiah 6:2; Isaiah 6:3).
Fallen angels, and a caution
Not all angels remained faithful: some 'did not stay within their own domain' and are held for judgment (BSB, Jude 1:6; 2 Peter 2:4), and Satan is described as a fallen power with his own angels (Revelation 12:9). A repeated warning is that angels, however glorious, are not to be worshiped, twice in Revelation an angel refuses John's worship and says 'Worship God' (Revelation 19:10; Revelation 22:8; Revelation 22:9), and Paul warns against the 'worship of angels' (Colossians 2:18). They are servants, not objects of devotion.