What do you notice about the narrative voice and viewpoint in the novel (to kill a mockingbird)

The narrative voice seen in this novel is from a six-year-old kid from the adult 'Scout' who adds innate innocence along with maturity in describing the story in her own perspective.

As an adult, she is mature to understand and address the viewpoint on social discrimination she has seen as a child.

Explanation

Along with the curiosity and innocence of three children, Scout, Jem and Dill, an important concern that reflected in the society is shown in the novel 'To Kill A Mockingbird'.

The important matter is the social atrocities done to the African-American people at the time.  

appeal to ethos is your answer.