It is likely that this angel is an archangel.
The Bible makes distinctions between certain angels. Some have more authority than others. It could be that they are higher in rank than other angels, or it could be temporary authority that has been given to them for a particular task.(Rev 10:1-3, 5-6 NASB95)
(1) I saw another strong angel coming down out of heaven, clothed with a cloud; and the rainbow was upon his head, and his face was like the sun, and his feet like pillars of fire; (2) and he had in his hand a little book which was open. He placed his right foot on the sea and his left on the land; (3) and he cried out with a loud voice, as when a lion roars; and when he had cried out, the seven peals of thunder uttered their voices. ... (5) Then the angel whom I saw standing on the sea and on the land lifted up his right hand to heaven, (6) and swore by Him who lives forever and ever, WHO CREATED HEAVEN AND THE THINGS IN IT, AND THE EARTH AND THE THINGS IN IT, AND THE SEA AND THE THINGS IN IT, that there will be delay no longer,(Rev 14:18 NASB95)
(18) Then another angel, the one who has power over fire, came out from the altar; and he called with a loud voice to him who had the sharp sickle, saying, "Put in your sharp sickle and gather the clusters from the vine of the earth, because her grapes are ripe."(Rev 18:21 NASB95)
(21) Then a strong angel took up a stone like a great millstone and threw it into the sea, saying, "So will Babylon, the great city, be thrown down with violence, and will not be found any longer.(Rev 19:17 NASB95)
(17) Then I saw an angel standing in the sun, and he cried out with a loud voice, saying to all the birds which fly in midheaven, "Come, assemble for the great supper of God,