Yuumi Book is a magical cat and one of the champions in the popular video game and anime adaptation, League of Legends. She is the devoted companion of the sentient book, Norra's Journal, and seeks her missing master, Norra, by traveling across realms. As an enchanter support, Yuumi uses her magic to heal and shield allies, making her a vital support to her team. Her playful demeanor and earnest loyalty make her both endearing and essential within the series.