"Aunt Alexandria fitted into the world of Maycomb like a glove, but never into the world of Jem and me" (Lee 175). Explain this quote and hot she is different than Jem and Scout

Aunt Alexandra moves through town like the grand dame she is..... she embraces her family heritage and takes her place among Maycomb society's leading women. Unlike Aunt Alexandra, Scout and Jem don't ponder the Finches' place in Maycomb's history and don't consider themselves the town elite. They lived in the present and saw themselves as no more than Atticus' family.