Seraphim

Divine
creatures from the Old Testament, associated with the Cherubim,
and later taken to be angels.
The
root of Seraphim comes either from the Hebrew verb saraph
('to burn') or the Hebrew noun saraph (a fiery, flying serpent).
Because the term appears several times with reference to
the serpents encountered in the wilderness (Num. 21.8,
Deut. 8.15; Isa. 14.29; 30.6), it has often been understood
to refer to "fiery serpents."
From
this it has also often been proposed that the seraphim were
serpentine in form and in some sense "fiery" creatures or
associated with fire. It is said that whoever lays eyes
on a Seraph, he would instantly be incinerated due to the
immense brightness of the Seraph.
They
are described as very tall, with six wings and four heads,
one for of the cardinal directions. One pair of wings are
for flying, one for covering their eyes (for even they may
not look directly at God), and one for covering their feet
(which is almost certainly a euphemism for genitalia).
They
are in the direct presence of God. In Isaiah's call-vision
in the Temple, he sees Seraphim surrounding the throne of
God, singing praise to God; the "Thrice Holy" hymn (ch.
6). In this instance they are angelic beings but in the
Book of Numbers, seraph-snakes are sent to punish the Israelites.
Some of the Seraphim are Metatron, Kemuel, Nathanael, Gabriel,
and Lucifer.
-see
also 'Fallen
Angels'-