……four living creatures full of eyes in front and behind. The first creature was like a lion, and the second creature like a calf, and the third creature had a face like that of a man, and the fourth creature was like a flying eagle. And the four living creatures, each one of them having six wings, are full of eyes around and within; and day and night they do not cease to say,“Holy, holy, holy is the Lord God, the Almighty, who was and who is and who is to come.” ~Revelation 4:6-8 [Source: https://bible.knowing-jesus.com/topics/Cherubim,-Description-Of%5D
This revelation by John echoes Ezekiel’s vision of angels who worship God in Heaven. In Revelation, they are 4 separate creatures, and in Ezekiel, they have four sides to their beings: Man, Bull/Ox, Lion, and Eagle, along with 3 pairs of wings and wheels with eyes all around. Man represents humans, the Bull represents God the Father, the Lion represents Jesus Christ, and the Eagle represents the feminine Holy Spirit. The wings denote power and intention to lift up and appear where they will, and the wheels with eyes show the ability to move where they will and to see everything.
This means that angels indeed walk among men and have the face of a man, and the attributes of God, Jesus, and the Holy Spirit. They appear and move everywhere and see everything. Their whole purpose is to worship God, day and night.
Conversely, demons are not depicted physically in the bible but prefer to do their wicked deeds in the dark and can be beautiful or ugly. They are spirits consigned to this earth until Jesus’ return after being cast out of Heaven for rebelling against God with Lucifer, their leader. They are shapeshifters and appear in whatever form can wreak havoc and terror on the psyches of God’s people. They seem real but are not real; this is part of the magic they can perform, just as in the magicians in the Old Testament. They can appear and disappear at random. They are known to us mostly as UFOs, aliens, orbs, cryptids, and other monsters. They manifest when they are sought out, such as with satanic rituals, spiritism, fortune telling, dabbling in the occult, and deviant behaviors.
Just as angels literally manifest as humans, “Be not forgetful to entertain strangers: for thereby some have entertained angels unawares,” [Hebrews 13:2] I think demons can also manifest as humans. This is really strange, but I believe it is true. I don’t understand how, but the ‘why’ is to turn God’s people away from Him to the devil, and to help deflect truth into half-truth, which he is expert at (as in the Garden of Eden).
As others have said, it is good to know the truth of these things, but it is not good to expend energy on understanding the devil or his demons; we should only spend our energy on knowing God.
Because what you seek, you will find.
~Song of Mary~ 