Cherubim
Cherubim have four faces: one of each a man, an ox, a lion, and an eagle. They have four conjoined wings covered with eyes, a lion's body figure, and they have ox's feet. Cherubim guard the way to the tree of life in the Garden of Eden (Genesis 3:24) and the throne of God (Ezekiel 28:14-16).
The cherubim are mentioned in Genesis 3:24; Exodus 25:17-22; 2 Chronicles 3:7-14; Ezekiel 10:12–14, 28:14-16; 1 Kings 6:23–28; and Revelation 4:6-8.
Modern English usage has blurred the distinction between cherubim and putti. Putti are the winged human baby/toddler-like beings traditionally used in figurative art.
St. Thomas Aquinas imagined Satan as a fallen Cherub.
Read more about this topic: Angels In Christianity, First Sphere