She may have been the only PI on earth whose father had been a partner at Morgan’s in France during the war. The only working PI who had come to New York City when she was seven and attended the Brearley School for girls on the Upper East Side, and then Sarah Lawrence.
-- Narration (chapter 1)

Importance: These lines of narration provide basic points of information regarding Celine's backstory. The narrative revisits some of these points in greater depth later, such as her family's relocation from France. Additionally, these facts emphasize the upper-class upbringing that defined Celine's childhood and adulthood.

[Gabriela was] in her early forties, the same age as [Celine’s] son, Hank..
-- Narration (chapter 2)

Importance: This line of narration reflects the fact that Gabriela is about the same age as Celine's son. This element of Celine's thought process seems to relate to Celine's overall sympathy towards Gabriela. Celine feels sympathetic towards Gabriela, just as...