Kendall Jenner is one of the world's top ranked supermodels. She is a popular television personality, starring with her family on Keeping Up with the Kardashians, which is seen in over 160 countries. She has won multiple Teen Choice Awards, including Choice Model. With a combined social media following of over 100 million users, Kendall is the most-followed model in the world. She is a cowriter of Time of the Twins, the sequel to Rebels: City of Indra, and lives in Los Angeles.

Kylie Jenner is an entrepreneur and creator of the successful cosmetics brand Kylie Cosmetics. She is a popular television personality, starring with her family on Keeping Up with the Kardashians, and is one of the world's most-followed people on social media with a combined fan base of over 100 million users. Kylie was named as one of the world's "Most Influential Teens" by Time magazine with her sister Kendall. Kylie is a cowriter of Time of the Twins, and lives in Los Angeles.