There are  different types of angels depicted in the bible that have varying degrees of  divine missions, different names and descriptions.  First of all they are  said to be with God..

Types of  Angels

Great is  the dignity of souls, so great indeed that each of them has
an angel  assigned  for its protection from the moment it is born. - St. Jerome.

Dionysius, a 5th or 6th century writer gives us the hierarchical order of the angels.

The  first group is the seraphim, cherubim and thrones. The word seraphim (singular is  saraph) is taken from the fiery imagery often associated with the Presence of  God-- Ezek. 1:27.  Cherubim are represented as guardians with many wings.  Thrones have been depicted wearing stoles and kneeling before  God.

The  name cherub (cherubim
plural) denotes the power of knowing and beholding God. Their  receptivity to the most high gift of light. Their contemplation of the beauty of  the divinity in its first manifestation. They are filled by participation and  divine wisdom and bounteously outpour to those below them from their own  fountain of wisdom. -Dionysius.

God  promised to commune with Moses "from between the cherubim" (Gen 25:22)  
Two cherubim were placed on the mercy-seat of the ark; two of  colossal size overshadowed it in Solomon's temple. Ezekiel (1:4-14) speaks of  four; and this number of "living creatures" is mentioned in Rev. 4:6. 

Those on  the ark are called the "cherubim of glory" (Heb. 9:5), Two cherubim were placed  on the mercy-seat of the ark; two of colossal size overshadowed it in Solomon's  temple. form the throne and chariot of Jehovah in his manifestation of himself  on earth.

He  dwelleth between and sitteth on the cherubim (1 Sam. 4:4; Ps. 80:1; Ezek. 1:26,  28). Ezekiel (1:4-14) speaks of four; and this number of "living creatures" is  mentioned in Rev. 4:6. Those on the ark are called the "cherubim of glory" (Heb.  9:5), i.e., of the Shechinah, or cloud of glory, for on them the visible glory  of God rested.



The 2nd  group is composed of dominations,virtues and powers.  Each group is associated with specific symbols. The  dominations held scepters and wore crowns. The virtues are shown with flasks of  perfume, trumpets, and rays of lightening. The powers are depicted wielding  flaming swords.





Raphael
is the healing angel.  Many nurses and physicians claim  angels have guided them.
And now  the Lord has sent me to heal thee, for I am the
angel Raphael  one of  the 7 who stand before the Lord. -Book of Tobias

The meaning  of angels throughout history and the world have different powers, are able to do  special things for their followers or believers.  Each angel was a distinct  species. Medieval thought was that angels were a distinct being, endowed with  intelligence and free will, which humans could never hope to  attain.


Gabriel
, the angel of the enunciation, in Daniel. 8:15-26 and  9:21-27.  Gabriel also appears in Luke 1:11 Zechariah was in the sanctuary when an  angel of the Lord appeared, standing to the right of the incense altar. 19 Then  the angel said, "I am Gabriel! I stand in the very presence of God. It was he  who sent me to bring you this good news!.

As a  messenger angel.
'principalities' comes in the form of communicating to people  about their personal problems or life decisions. Some believe that Gabriel  submits prayers to heaven or bring information to us. 

Uriel is  an angel of death
who was also thought to be the angel of transformation, is  believed to be standing by people on the verge of death. 


There is  another angel that appears if a person has died.  There is said to be an  angel called the
Gatekeeper who comes to gently lead them into the spiritual realm. 

Michael
the archangel appears as a warrior angel in 1 Thess. 4:16 and  Jude 9.  Michael is said to be the defender angel who does battle Daniel  10:13, 21; and 12:1. Also in Romans. 8:38, Eph. 1:21, and Col. 1:16.   .  The guardian angels are all aspects and forms of Michael, personal  guardian angels, as well as those that help armies and protect nations. They say  that earth has an angel.


"Take  heed that you do not despise one of these little ones (children and animals),  for I say to you that in heaven their
angels always see the face of My Father who is in  heaven."

"So He  drove out the man; and placed at the east of the garden of Eden
Cherubim, and a flaming sword which  turned every way, to keep the way of the tree of life".  Gen.  3:24

"Seraphim
stood above Him, each having six wings; with two he covered his  face, and with two he covered his feet, and with two he flew" . Isaiah 6:2 

For the  Lord himself shall descend from heaven with a shout, with the voice of the 
archangel, and with the trump of God: and the dead in Christ shall rise  first" 1 Thess. 4:16.

               Angels are  found throughout the Old Testament and also in the New Testament, though less  often. 
Origen, one of the earliest biblical scholars living at the time of  the first Century, recognized the notion of Guardian Angels.  St. Jerome told us that  each of us is given a Guardian Angel at birth, and St. Thomas concurred with  this belief.  The Old Testament was not explicit on a personal Guardian  Angel but there was a belief that guardian angels put people under their  protection.

"Angels of  the Lord" "As he considered this, he fell asleep, and
an angel of the Lord appeared  to him in a dream. "Joseph, son of David," the angel said, "do not be afraid to go  ahead with your marriage to Mary. For the child within her has been conceived by  the Holy Spirit. When Joseph woke up, he did what the angel of the Lord  commanded. He brought Mary home to be his wife."  Matthew  1:20-24

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Archangels: The 3rd group includes the principalities, protectors of nations,  the archangels, and the angels who protect humans.  The word "archangel" is  not found in the Old Testament. 
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