Praise him, all ye stars of light. Praise him, ye heavens of heavens, And ye waters that are above the heavens. Angels do not reproduce but were all individually created By God. There are good angels that carry out His desires and will. There are bad angels or demons that work against God's will and do the will of satan.
Angels also have grades or ranks and they vary in ability and power.
But Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing judgment, but said, The Lord rebuke thee. And I heard a man's voice between the banks of the Ulai, which called, and said, Gabriel, make this man to understand the vision. Gabriel appears before Zacharias and announces the birth of John the Baptist and tells of John's calling and service. And there appeared unto him an angel of the Lord standing on the right side of altar of incense. And Zacharias was troubled when he saw him, and fear fell upon him.