Cardcaptors is the American version of the Japanese anime Card Captor Sakura. The main characters are Sakura Avalon and Li Showron, who, assisted by Keroberos (Kero), and Sakura's best friend Madison, try to capture the escaped Clow cards, and return them to the mystical book that holds them, the Clow. Also on hand are Sakura's older brother, Tori, and father, Aiden, Tori's best friend, Julian, Li's cousin, Meilin, and various classmates and friends of Sakura and Li.