An expert writer of stories needs to have some mastery of psychic distance—the distance the narrator stands from a character’s emotions, thoughts, and perceptions. No matter what viewpoint or person or verb tense you’re using for your story, your narration will sometimes go very close to character perception and sometimes stay quite distant.
Dealing with main characters, antagonists, allies, and all other varieties of characters in your stories.
Character arc (aka the internal plot) is essential for a satisfying story structure. You might have tension on every page and you might follow what you think is a winning structure, but if you don’t have a character arc, your story will fail to resonate with readers. Learn the key concepts for character arcs here.