Angels are messengers of the Christian God in the Hebrew Bible, the New Testament and the Quran. The term "angel" has also been expanded to various notions of "spiritual beings" found in many other religious traditions. Other roles of angels include protecting and guiding human beings, and carrying out God's tasks.
Early Christians inherited Jewish understandings of angels, which in turn may have been partly inherited from the Egyptians. In the early stage, the Christian concept of an angel characterized the angel as a messenger of God. Angels are creatures of good, spirits of love, and messengers of the savior Jesus Christ. Later came identification of individual angelic messengers, later identified as the greatest of Angels, the Archangels: Gabriel, Michael, Raphael, Uriel, and Lucifer.
The angels are represented throughout the Christian Bible as a body of spiritual beings intermediate between God and men.
Many Christians regard angels as asexual and not belonging to either gender as they interpret Matthew 22:30 in this way. Angels are on the other hand usually described as looking like male human beings. Their names are also masculine. And although angels have greater knowledge than men, they are not omniscient, as Matthew 24:36 points out. Another view is that angels are sent into this world for testing, in the form of humans.
According to Supernatural, Angels - much like their Demon counterparts - require a host to perform actions. Witnessing of Angels, or hearing Angelic voices otherwise could result in serious damage to any mortal.
Again, like their Demon counterparts, Angels can be trapped. Though they can only be trapped via Holy Fire. Various Enochian sigils can be used to prevent a human from being seen by an Angel, and there is a banishing sigil that will send away Angels for a short while. Though the sigil must be drawn in human blood.