Who is Anna in the Bible?

Anna is the prophetess who saw the Holy Family at the Presentation of Jesus at the temple. The Gospel of Luke 2:36-38 tells us about Anna:

And there was a prophetess, Anna, the daughter of Phanuel, of the tribe of Asher; she was of a great age, having lived with her husband seven years from her virginity, and as a widow till she was eighty-four. She did not depart from the temple, worshiping with fasting and prayer night and day. And coming up at that very hour she gave thanks to God, and spoke of him to all who were looking for the redemption of Jerusalem.