Seraphim - These are the highest order or choir of angels. They are the angels who are attendants or guardians before God's throne. They praise God, calling, "Holy Holy Holy is the Lord of Hosts". the only Bible reference is Isaiah 6:1-7. One of them touched Isaiah's lips with a live coal from the altar, cleansing him from sin. Seraphim have six wings, two cover their faces, two cover their feet, and two are for flying.