There is alot of information out there regarding "Michael" on place to check is Michael (archangel - Wikipedia, the free encyclopedia
) or just do a google search.
In my experience I've learned that whatever type of spiritual journey you are on you need to know the "good" stuff and the "bad". Protection is a very normal and important part of our journey. For as long as I remember I have prayed (asked) for "Jesus to protect me physically, mentally and spiritually".
How I personally think of Michael is as a great protector and warrior.
Hope that helps a bit.