Aunt Alexandra's Relationship In To Kill A Mockingbird

What impact does Aunt Alexandra have on the Finch family and on Maycomb?
As soon as Aunt Alexandra enters the Finch household, she quickly begins to manipulate and change the twist the family from a loving one and a caring one, to one that is cold hearted and full of arguments and fights.
We are first introduced to Aunt Alexandra at Christmas, on this day we find out that Aunt Alexandra is so different from her easy-going brothers Atticus and Jack that Scout wonders if she was switched at birth with another family’s baby. She’s the kind of woman who wears a corset even under her bathrobe. Scout compares her to Mount Everest: “throughout my early life, she was cold and there”. And whenever Scout expresses a desire to do something Aunty believes
But with the addition of Aunt Alexandra to the house, who quickly manipulated him because she felt that he wasn’t raising his children to be ladies and gentlemen. She feels that the Finches are better than any other family in Maycomb, this point is shown when she says
"'Don't be silly, Jean Louise,' said Aunt Alexandra. 'The thing is, you can scrub Walter Cunningham till her shines, you can put him in shoes and a new suit, but he'll never be like Jem. Besides, there's a drinking streak in that family a mile wide. Finch women aren't interested in that sort of people.'"
In the Finch family, there is Calpurnia who is a cook, but when Aunt Alexandra arrives, she immediately wants to get rid of her because she is black. Even though Aunt Alexandra feels so strongly about this, Atticus fights his ground and says "Alexandra, Calpurnia's not leaving this house ... until she wants to. You may think otherwise, but I couldn't have got along without her all these years. She's a faithful member of this family and you'll simply have to accept things the way they are." The reason Aunt Alexandra wants to get rid of Calpurnia is because Aunt Alexandra’s idea of family is based on exclusivity – kicking out those who aren’t worthy of being counted in – Atticus’s is much more inclusive. Aunt Alexandra arranges family by blood,
She is also very traditional, scout contrasts with Aunt Alexandra because she says "I never understood her preoccupation with heredity. Somewhere, I had received the impression that Fine Folks were people who did the best they could with the sense they had, but Aunt Alexandra was of the opinion, obliquely expressed, that the longer a family had been squatting on one patch of land the finer it was." Aunt Alexandra sees the Finch name like an exclusive brand – it’s valuable when you can only find it at Bloomingdale’s, but make it available at a corner shop and it’ll seem cheap. Aunt Alexandra’s obsession with “What Is Best For the Family”– in Scout’s ears, Aunty often speaks in Capital Letters Of Doom – is part of her more general way of classifying people by family