If Verity’s sins were knives, quick and vicious, then Prosperity’s were poison. Slow, insidious, but just as deadly.
-- Narrator (Verse 1: Chapter 1)

Importance: Kate reflects on Verity and Prosperity’s history. While Verity’s dangers were more apparent, Prosperity was also corrupt in more subtle ways.

And here in Prosperity, Kate had found a purpose, a point, and now when she met her gaze in the mirror, she didn’t see a girl who was sad or lonely or lost. She saw a girl who wasn’t afraid of the dark.
-- Narrator (Verse 1: Chapter 2)

Importance: Kate feels motivated since she has started monster hunting in Prosperity. While she is still figuring out her personal identity since leaving behind Verity, she acknowledges that she has grown much in her six months in Prosperity.

Monsters… all want the same thing: to feed. They are united by that common goal, while you are all divided by your morals and pride...
-- August Flynn (Verse 1: Chapter 12)