I see Scout as an impressive character because of what she must learn--and what she is able to experience--at such a young age. At the end of the novel, Scout, as an adult narrator, beautifully recalls all the things she has learned and seen--and still is able to preserve the child-like innocence that readers come to love about her over the course of the novel.
Scout is two people in the novel: the child who experiences the story and the adult narrator who relates it. As a narrator, Jean Louise is impressive for her sensitivity and understanding of human nature and the human condition. She is likable because she seems to enjoy poking fun at the little girl she used to be. She is admirable for her sense of justice and decency, values she learned from her beloved father during a very difficult time.
As a little girl, Scout is impressive for her strength, intelligence, curiosity, and independence. She is her own little person and resists all efforts from those adults who attempt to change her. Aunt Alexandra and Caroline Fisher come readily to mind here. Scout has a strong sense of right and wrong, an almost intuitive understanding of evil when she encounters it. Her reaction to her teacher, Miss Gates, supports this. Scout knew something was wrong with Miss Gates, and others like her, without even knowing the word "hypocrisy." Another impressive feature is Scout's loving nature, Cecil Jacobs and Cousin Francis aside! She loves those worth loving: her father, her brother, Calpurnia, Miss Maudie, and Arthur Radley. She probably loved her Aunt Alexandra, too, although she never would have admitted it while they battled over Scout's attire.
SHE WAS VERY CALM IN RECALLING EVERYTHING IN HER LIFE, EVEN THE SAD PART
Scout is a very impressive character as she relates the happenings of the story years later and can do them so well through the eyes of a little girl. She doesn't seem to gloss over anything, but tries to understand and come to terms with important social problems.