Angel

From Wikipedia

In many religions, an angel is the good spirit. In the Old Testament, the New Testament, and the Qur'an angels appear frequently as the messengers of God. In all of ase, angels appear like humans. They usually have wings like the bird. In Christianity angels are helpers of god who are ministers to the faithful. Angels don't have the ability to sin.

The word angel comes from the Greek word angelos which means "messenger".