Pharaoh (possibly Amenhotep II)
Exodus 5:2 But Pharaoh said, “Who is the Lord, that I should obey his voice and let Israel go? I do not know the Lord, and moreover, I will not let Israel go.”
Exodus 7:1 And the Lord said to Moses, “See, I have made you like God to Pharaoh, and your brother Aaron shall be your prophet.
Exodus 7:11-12 Then Pharaoh summoned the wise men and the sorcerers, and they, the magicians of Egypt, also did the same by their secret arts. For each man cast down his staff, and they became serpents. But Aaron’s staff swallowed up their staffs.
Exodus 8:19 Then the magicians said to Pharaoh, “This is the finger of God.” But Pharaoh’s heart was hardened, and he would not listen to them, as the Lord had said.
Exodus 8:29 Then Moses said, “Behold, I am going out from you and I will plead with the Lord that the swarms of flies may depart from Pharaoh, from his servants, and from his people, tomorrow. Only let not Pharaoh cheat again by not letting the people go to sacrifice to the Lord.”
Exodus 12:51 And on that very day the Lord brought the people of Israel out of the land of Egypt by their hosts.
Exodus 14:31 Israel saw the great power that the Lord used against the Egyptians, so the people feared the Lord, and they believed in the Lord and in his servant Moses.
Amalek (grandson of Esau)
Exodus 17:14-16 Then the Lord said to Moses, “Write this as a memorial in a book and recite it in the ears of Joshua, that I will utterly blot out the memory of Amalek from under heaven.” And Moses built an altar and called the name of it, The Lord Is My Banner, saying, “A hand upon the throne of the Lord! The Lord will have war with Amalek from generation to generation.”
Azazel (some kind of wilderness demon apparently)
Leviticus 16:8-10 And Aaron shall cast lots over the two goats, one lot for the Lord and the other lot for Azazel. And Aaron shall present the goat on which the lot fell for the Lord and use it as a sin offering, but the goat on which the lot fell for Azazel shall be presented alive before the Lord to make atonement over it, that it may be sent away into the wilderness to Azazel.