Answer:
Isaiah
Explanation:
The prophet who announces the coming of the messiah is Isaiah one of the four major prophet. "Well, the Lord himself will give you a sign: Behold, a maiden is pregnant and will give birth to a son, and will name him Emmanuel." Isaiah 7.14. As we can see he is one of the characters of the Old Testament that announces the coming of the Messiah.
In this particular appointment, when he talks about the maiden, he is referring to nothing more and nothing less than the Blessed Virgin Mary, wife of Joseph, who, even though she was a Virgin, became pregnant by the work and grace of the Holy Spirit, a text that can be seen more forward in the New Testament.
