Do you young warrior, hear my age advise
What should the readers pay attention to is how the characters say, behave and feel in every line or how they were able to react in each scene or part. This will allow them to notice how the characters evolve or how they were able to develop in each scenario that is happening on the character's life as the story goes. For this is essential in reading a story or a book.
Omniscient narrator should be the answer.
