Answer:
the character or voice that tells a story in a narrative
Explanation:
The narrator is usually the voice in the beginning or end of a movie that explains what is happening, or perhaps the moral of the story.
The main character of a narrative is just that, the main character. In some cases the main character can also be the narrator, but usually this is not the case, or the main point.
The character or voice that tells a story in a narrative is the narrator because they are telling the narrative, also known as the story.
The point of view from which a narrative is told is either 1st person (speaking in I or me terms), 3rd person (speaking in he,she,them terms), or other views. It's not so much of a who as a label on how a story is told.
The way characters in a narrative are described will be character attributes or adjectives.