Shelby

Shelby was Dr. James Whitman's former assistant. It is implied that he doesn't even know her name, calling her "Shelly'. After his failed efforts to make the TV network fund the third season of his show, Shelby is shown leaving the Endurance with an unnamed cameraman, with Whitman still pretending that they are his assistants, saying: "We'll see you tomorrow!"

Personality
Shelby seems like a respectable nice woman, who has been revealed to show quite a disliking towards her former employer.

Trivia

 * Like Whitman's former wife - Sheila, Shelby is shown to love purple. It's incorporated in every outfit we have seen her in so far.
 * Shelby's hair is shown to be light brown on the first page of the book, but when we see her again, her hair is blonde.