These are the angels who are closest to God, the highest order of the choir of angels. They encircle his throne and emit an intense, fiery light representing his love. These angels are considered to be light-burners, and are watchful over the true of heart.
They are the watchtowers of faith. They keep their focus attuned to the faithful, vigilant and determined souls who hunger for the truth of enlightenment. 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 to cover their faces, two to cover their feet, and two for flying.
There are only four seraphim and each has four faces and six wings. When they come to Earth, they leave their serpent appearance behind, preferring tall, thin, clean-cut human embodiments.