The Angel of the LORD
"In some passages he appears to be God.
Genesis 16:11-13 (NIV) The angel of the LORD also said to her: 13 She gave this name to the LORD who spoke to her: "You are the God who sees me," for she said, "I have now seen the One who sees me."
Judges 13:21-22 (NIV) When the angel of the LORD did not show himself again to Manoah and his wife, Manoah realized that it was the angel of the LORD. 22 "We are doomed to die!" he said to his wife. "We have seen God!"