Serena is the older sister to Cody Caufin. She is a bit colder, but also very nice and just kids around with her brother. She means no harm towards Cody and wishes he’s okay and out of harm’s way, and for god’s sake to get to school on time. Serena is one of those kids who seemingly doze off in class. Serena is unaware of the Finders, Spades or Diamonds, unlike her brother Cody, who has a lot of knowledge on it. She is friends with Cody, James and Kyle.