The reader’s first introduction to protagonist Darius shows them what he cares about:
The Lord of the Rings series (Smaug is a dragon antagonist in
The Hobbit, J. R. R. Tolkien’s prequel novel) and tea. The tea in particular ties Darius to his Persian (Iranian) identity, and he has very particular ideas about the appropriate way that one should steep and drink tea. He’s also able to find the humor in this particular hobby with the Farsi tea joke. This highlights that Darius himself is fun loving and willing to look critically and humorously at his Persian culture—though Mr. Apatan, on the other hand, isn’t.