An angel is a supernatural being or spirit, usually in humanoid form with feathered wings on their backs and halos around their heads, found in various religions and mythologies.
The theological study of angels is known as "angelology". In Zoroastrianism and Abrahamic religions they are often depicted as benevolent celestial beings who act as intermediaries between Heaven and Earth, or as guardian spirits or a guiding influence.
The term "angel" has also been expanded to various notions of spirits found in many other religious traditions. Other roles of angels include protecting and guiding human beings, and carrying out God's tasks.
In art, angels are often depicted with bird-like wings on their back, a halo, robes and various forms of glowing light. from Wikipedia.
Michael (translation: who is like God?), kindness of God
Gabriel (translation: the strength of God), performs acts of justice and power
Raphael (translation: God Heals), God's healing force
Uriel (translation: God is my light), leads us to destiny
Samael (translation: the severity of God), angel of death — see also Malach HaMavet (translation: the angel of death)
Sandalphon (translation: bringing together), battles Samael and brings humankind together
Camael/Chamuel (translation: one who seeks God), expelled Adam and Eve from the Garden of Eden holding a flaming sword and punishes those who transgress against God
Sataniel/Satan (translation: the adversary), tempts humans, serves as an adversary, and brings people's sins before them in the heavenly court
Metatron (translation is disputed, may mean "keeper of the watch", "guardian", or "he who sits behind the throne of Heaven"), God's heavenly scribe recording the deeds of all that is done in Earth and Heaven and all of Creation. from Wikipedia.