Revelation writes that Michael with His Angels fought against the Devil and his angels, and there is only One being who can defeat the Devil:
Revelation 12:7-9 King James Version (KJV)
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.
The verse below depicts Michael disputing for the body of Moses instead of accusing him for his sins:
Jude 9 King James Version (KJV)
9 Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.
In the first book of John, the Bible tells us that we have an advocate that shares the same non accusing characteristic as Michael:
1 John 2:1 King James Version (KJV)
1 My little children, these things write I unto you, that ye sin not. And if any man sin, we have an advocate with the Father, Jesus Christ the righteous:
The prophetic book of Daniel writes that Michael is “The Great Prince” who will stand up at the time of trouble at the end of the world:
Daniel 12:1 King James Version (KJV)
1 And at that time shall Michael stand up, the great prince which standeth for the children of thy people: and there shall be a time of trouble, such as never was since there was a nation even to that same time: and at that time thy people shall be delivered, every one that shall be found written in the book.
The Angel speaking to Daniel in vision refers to Michael as “your prince”:
Daniel 10:21 King James Version (KJV)
21 But I will shew thee that which is noted in the scripture of truth: and there is none that holdeth with me in these things, but Michael your prince.