Authors introduce characters either by directly stating what they look like (and think like), or by showing those things indirectly.
how to introduce a person
The stage in which the author introduces the characters is typically the exposition. This is where the characters, setting, and basic conflict of the story are established.
As they are fictional the author of the story could introduce some twist in the plot to allow this to happen.
Yes, although this is not always the case. If a story is written in the First person, then the author is the narrator.
A biography is a true story about a person. An autobiography is the life story of the author.
First person point of view
the narrator is the person (or animal) that is telling the story. The author writes the story, but the story is told by the narrator.
an author
How the author fells about the person,place or thing.
its when the author tells the story in the third person using pronouns like they, she, he, it, we, etc.
The pronoun I or we or our.
This is when an author reveals a person in the story characterization by giving specific descriptions.