I like to think Prior to Lucifer fall. Whenever he and Michael got into trouble (with pranks, Lucifer ideas etc.) Michael would always defend him without hesitation and take part of the blame and side with Lucifer. However that changed ONLY after his twin gave the apple to eve, He could understand love, he saw how happy his brother was in Eden. But He couldn't defend him when he was called up to be the one to harm him /cast him out. He regrets that choice, sometimes thinking he should have rebelled that very day with Lucifer.












