Michael

Michael is an extremely powerful archangel. He is God's Lieutenant and the one who personally "kicked" Lucifer out of Heaven during the last war and possible the only thing that beat him again. Michael's vessel was said to be Dean, but Dean refused to allow Michael to posses him. Dean's refusal angered Zachariah.

Known powers
Currently this is unknown, but it could be assumed that he is the strongest angel under God's command.

Family
God (Creator)

Angels (brothers and sisters)

Jesus (master)