Obviously Jesus is Michael as Rev 12:7 "war broke out in heaven: Miʹcha·el and his angels battled with the dragon"
Gen 3:15 "And I will put enmity between you and the woman and between your offspring and her offspring. He will crush your head, and you will strike him in the heel.”"
The seed crushing the serpent in the head is Jesus. Thus Michael is doing Jesus' job.