What type of relationship does Rebecca have with her older sister in the novel, Dear Elijah?

Rebecca's relationship with her older sister, Fanny, is complex. According to Rebecca, "Fanny's unconscious mind is just consumed by dreams of power." Fanny seems to be forever bossing Rebecca around and putting on airs as the more mature of the two. Her adolescent interests in clothes and boys irritate Rebecca because Rebecca's interests are heading elsewhere—into the arts such as writing and into religious introspection.