Who is Saint Michael?
Saint Michael is an archangel. Like all angels he is a being of spirit who can manifest in physical form. He bears the title of Saint to reflect his place in the hierarchy of Heaven. Indeed, Saint Michael holds the highest rank second only to the Trinity. He is the Prince of the Heavenly Host, Defender of the Faith and all believers. It is he who will lead the forces of God against Lucifer and the fallen angels in the final battle. He is the patron of all who fight the forces of evil.
Revelation 12:7-9
7 And there was war in heaven: Michael and his angels fought against the dragon; and the dragon fought and his angels,
8 And prevailed not; neither was their place found any more in heaven.
9 And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.