Not being a Catholic, I have absoutely no idea what these references to ‘St. Michael’ mean.................
Saint Michael the Archangel is in the Old Testament. In Catholic traditions he is the defender of the Church and nemesis of Satan.
Our priest always leads us in Saint Michael's prayer at the conclusion of mass:
"Saint Michael the Archangel, defend us in battle. Be our protection against the wickedness and snares of the devil; May God rebuke him, we humbly pray; And do thou, O Prince of the Heavenly Host, by the power of God, thrust into hell Satan and all evil spirits who wander through the world for the ruin of souls. Amen."