Analyze Rin’s character progression through the novel: How does she change, and what events lead to this change?

Since the novel is told from Rin’s third-person limited point-of-view, we understand other characters through her observations. Using these observations, analyze how Nezha changes throughout the novel. What motivates him to behave as he does?

While the Hesperians were absent in The Poppy War, they are an important part of The Dragon Republic. How do they affect the events of both novels?