Angel patrons of the Legion are invoked in the concluding prayers,
Apocalypse 12:7 says,
"And there was a great battle in heaven, Michael and his angels fought with the dragon." St. JohnSaint Michael will assist us as when we encounter evil doing our Legion work.
Saint Gabriel has a special relationship to Mary. He brought God's message to her at the Annunciation. His words form the Hail Mary.
"Hail full of grace the Lord is with you."   Luke 1:28Saint Gabriel has been an active participant in the world's salvation. We can count on him.
Saint Raphael appears in the Bible in the book of Tobit. He heals Tobit of his blindness and helps Tobit's son, Tobiah, to find a wife. He then reveals his identity: "I am Raphael, one of the seven who stand before the throne of God"
St. Raphael is the patron saint of travelers, the blind, bodily ills, happy meetings, nurses, physicians and medical workers.
Mary's Legion of Angels   In many places the bible speaks of large numbers of angels. Mary is Queen of heaven and has authority over them. She can command angels to help us. Jesus says that each of us has a Guardian Angel who protects and helps us.
When we are working with someone to say the Rosary or to bring them back, guardian angels will assist us. Our Guardian Angel and theirs both know better than we, what is at stake.
Angel of God, my guardian dear,