The title refers to the twin-snake wristband Sebastian gifts to Rain. A snake can also refer to an untrustworthy person, something which Rain concludes about Callahan.
Music in Rain's Head
Slinky piano that kind of gave her the creeps—as she is walking home alone
Slow and pretty jazz cornet—as Sebastian is about to give her the wristband
Abuela (Spanish): grandmother
Rue de Lafitte (French): literally Lafitte Street, likely named after Jean Lafitte, a French pirate who operated in the Gulf of Mexico in the 1800s.
Character Name References
Callahan is likely a reference to Caliban, one of the antagonists in The Tempest
Alonso, Rain's father, is a reference to the eponymous King of Naples in The Tempest
Sebastian, Rain's maternal grandfather, is a reference to the treacherous brother of King Alonso in the Tempest
Character Name Meanings
Nitaino (Taino): The Tainos are the pre-Columbian indigenous inhabitants of the Bahamas and the Antilles, and presumably the Prospero Keys as well. Taino society is divided into the Nitainos (nobles) and Naborias (commoners).
Iris (Greek): In Grecian mythology, Iris is the goddess of the rainbow. English, which borrows from the same source, gives multiple definitions of Iris as a purple flower, and part of the human eye.
Alonso (Spanish): Derivative of Alfonso, which is a germanic name probabily meaning "noble" (Alal) and "ready" (Funs). Alternatively, the first element could be "battle" (Hadu or Hild). (Source: http://www.behindthename.com/name/alfonso)
Charlie: I can't believe you said yes. Rain: Why wouldn't I say yes? Charlie: After the way you interrogated her? Rain: Waterskiing, Charlie. It was a good offer. Besides, if we weren't a little shallow, we wouldn't be teenagers.
Rain: I’m never going to do anything. I’ll never go anywhere. I’ll graduate high school and spend the rest of my life ushering tourists around these same eight islands! Sebastian: Now I don’t believe that, Raindrop. I don’t believe that for a second. This is home. And frankly, it’s not a bad place to make a life. So you may come back someday to usher tourists. After all, I did. But you’ll get your own chance to decide. You've always been special, Rain. An adventurer. We’d turn our backs for a minute, and you’d be off exploring. Before you could walk, even. And I remember watching you as you grew up. You’d have long conversations with your imaginary friends. You’d fight pirates. Find treasure. Solve mysteries. I knew you were destined for greatness
Why did the snake eyes flash blue? Why did the other snake flash gold, in conjunction with Rain's eyes?
Why did Bastian and Rain feel tired after he handed over the band?