No matter what question I ask, the answers all point in one horrifying direction. I have no idea who I am.
-- Sia (Chapter 1 paragraph 7)

Importance: This is the moment Sia realizes that she’s lost her memory, the event that prompts the rest of the action in the story.

But somehow, the spirit of gathering here at the end of a day, knowing no one will spit or urinate on me and that I’m relatively safe and among equals, feels oddly comforting. For me and many other homeless, the bridge has become home.
-- Sia (Chapter 6 paragraph 1)

Importance: Sia has been on the streets for several days at this point, and she has fallen into a semblance of a routine. Later, Sia revisits the bridge in her search for Carol and she’s amazed at how frightened she is. The bridge takes on a totally different feel once Sia is no longer part of the homeless culture.

Not...
-- Duke (Chapter 10 paragraph 34)