The proper function of angels is still observed by
MOST of the heavenly angels

Now angels in Scripture are called “sons of God” in Job chapters one and two, and are associated with “stars.” I am not trying here to explain that association, rather I am just trying show you that it is there. A clear example is,

“When the morning stars sang together,
And all the sons of God shouted for joy?”
Job 38:7 WEB

There is an account of the battle in heaven in Revelation 12 between good angels and bad angels. There is a “great red dragon” Rev 12:4, who is called the devil and Satan,” Rev 12:9. This “dragon” is able to draw one-third of the angels/stars of heaven into his revolt, Rev 12:4.

So it is that most of the angels of heaven
(a good two-thirds of them)

are still serving God. The purpose of angels is given in Hebrews 1.

“Aren’t they all ministering spirits, sent out to do service for the sake of those who will inherit salvation?”
Heb 1:14 WEB

This is clearly reflected the many verses and stories in Scripture. They are not, however, always seen by men. An angel helps Hagar in Genesis 16 in a very visible way. Angels arrived as men in Sodom in the beginning of Genesis 19 in order guide Lot to safety. Satan appeared as serpent to Eve, and angels appear as men when they meet Abraham in Genesis 18, and Abraham prepares a meal for them and they eat that meal. The author of Hebrews counsels us,

“Don’t forget to show hospitality to strangers, for in doing so, some have entertained angels without knowing it.”
Heb 13:2 WEB

Angels diligently look after the righteous.

“For he will give his angels charge over you,
To guard you in all your ways. ”
Psa 91:11

There is a special angel of the presence of the Lord that is mentioned in Scripture. This is a “messenger” who is intimately involved with Yahweh. (Some speculate that it is Jesus Himself, but if so, that is not clearly stated.)

“In all their affliction he was afflicted, and the angel of his presence saved them: in his love and in his pity he redeemed them; and he bore them, and carried them all the days of old.”
Isa 63:9 WEB

They are mighty in power and can have astonishing results when they are instructed to do so.

“The angel of Yahweh went forth, and struck in the camp of the Assyrians one hundred and eighty-five thousand; and when men arose early in the morning, behold, these were all dead bodies.”
Isa 37:36 WEB

Those who are inclined to abuse children
are warned by Jesus,

“See that you don’t despise one of these little ones, for I tell you that in heaven their angels always see the face of my Father who is in heaven.”
Mtt 18:10 WEB

Knowledge of that should affect how men treat children, today, and always.

WEB is the World English Bible, a copyright free revision
of the original ASV American Standard Version 1901