What is a Seraph?

The following is a mash-up of information I found on the internet:

A seraph (plural, seraphim) is one of a class of divine creatures or celestial beings. The root word comes either from the Hebrew verb saraph ("to burn") or the Hebrew noun saraph ("a fiery flying serpent"). The term saraph appears several times in the Old Testament, with reference to the serpents encountered in the wilderness. 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.

Seraphim are described as very tall, generally having the figures of men, with six wings and four heads (one for each 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.

Seraphim serve and are in the direct presence of God. It is said that whoever lays eyes on a seraph would be instantly incinerated due to their immense brightness. [Do you remember the final scene in "Raiders of the Lost Ark" in which the Nazis were consumed by fire? They foolishly dared to look at the seraphim protecting the Ark of the Covenant.]

Later Jewish imagery perceived seraphim as having human form, and in that way they passed into the ranks of Christian angels. In the Christian angelic hierarchy, seraphim represent the highest rank of angels.

King James Bible, Isaiah 6: 1-2 "In the year that king Uzziah died I saw also the Lord sitting upon a throne, high and lifted up, and his train filled the temple. Above it stood the seraphims: each one had six wings; with twain he covered his face, and with twain he covered his feet, and with twain he did fly."