Its English name Angel comes from the Greek angelos messenger.

In Judaism, Islam and Christianity, the concept of angel is very similar. They are souls who serve God. God sent them to help those in need and convey God's will. They are God's spokesmen on earth. Angels are in the shape of people (that is, the shape of gods). They will shine on their bodies, with rings on their heads and wings behind them. Although many people claim to have witnessed the appearance of angels. However, the angel itself is a spiritual body without substance, and there are few examples of materialization, and it will consume a lot of spiritual strength. If it wants to appear in a physical state without consuming mental strength, it must be possessed. But because angels are "pure bodies", they can't be possessed by any creature. The only one can only be possessed by a body without original sin (a creature without soul). Angels are the embodiment of pure "good", so they will never tolerate the existence of "evil", but they are not friends of human beings. According to the Old Testament, angels will severely punish sinners according to God's command.