The color of the leaf is exactly the same color as Jenna's name – a bright shimmering shade of green with some yellow highlights.”
-- Mia (chapter 1 paragraph 7)

Importance: This is the first time Mia has described the color of a name and it's the reader's first look at this aspect of Mia's synesthesia. Mia goes on to say that she likes the color of Jenna's name and that might have had something to do with the fact that they became friends so quickly.

Part of his soul is right next to me, stored safe and sound inside Mango. I knew this as soon as I saw the little kitten sitting by Grandpa's grave that day, looking up at me with Grandpa's eyes.”
-- Mia (chapter 2 paragraph 21)

Importance: Mia is explaining how and why she believes that a portion of her grandfather's soul lives inside Mango. This explains both Mia's attachment to Mango and the fact that she grieves so deeply...